Species List - North America

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Acanthametropodidae
Ameletidae
Ametropodidae
Arthropleidae
Baetidae
Baetiscidae
Behningiidae
Caenidae
Ephemerellidae
Ephemeridae
Euthyplociidae
Heptageniidae
Isonychiidae
Leptohyphidae
Leptophlebiidae
Metretopodidae
Neoephemeridae
Oligoneuriidae
Palingeniidae
Polymitarcyidae
Potamanthidae
Pseudironidae
Siphlonuridae

Current Number of Valid, Extant North American Species [Not Including Multiple Subspecies, Nomina Dubia (dub.), Recently Extinct Species, or the 2 Non-Nearctic Species Introduced to Hawaii]: 658 (BER: 0, CAN: 338, GRE: 1, MEX: 153, SPM: 0, USA: 573). All Hawaiian species have been introduced and currently are presumedly extirpated from the islands.

This list has been compiled and is maintained by Mayfly Central, Purdue University. If you have questions about interpreting the list, see How to read The Mayflies of North America; if you have questions about the family classification see Higher classification.

ACANTHAMETROPODIDAE

• Acanthametropus pecatonica (Burks, 1953) [USA:NE,SE]
  • Metreturus pecatonica Burks, 1953 (orig.)
• Analetris eximia Edmunds, 1972 [CAN:NW;USA:NW]

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AMELETIDAE

• Ameletus amador Mayo, 1939 [CAN:NW;USA:NW,SW]
• Ameletus andersoni Zloty, 1996 [USA:NW]
• Ameletus bellulus Zloty, 1996 [CAN:NW;USA:NW,SW]
• Ameletus browni McDunnough, 1933 [CAN:NE;USA:NE]
• Ameletus celer McDunnough, 1934 [CAN:FN,NW;USA:FN,NW,SW]
  • Ameletus alticolus McDunnough, 1934 (syn.)
  • Ameletus celeroides McDunnough, 1934 (syn.)
  • Ameletus tuberculatus McDunnough, 1939 (syn.)
• Ameletus cooki McDunnough, 1929 [CAN:NW;USA:NW,SW]
• Ameletus cryptostimulus Carle, 1978 [CAN:NE;USA:NE,SE]
• Ameletus dissitus Eaton, 1885 [USA:NW]
• Ameletus doddsianus Zloty, 1996 [USA:NW,SW]
  • Ameletus sp. A Allen & Chao, 1981 (syn.)
• Ameletus edmundsi Zloty, 1996 [USA:NW,SW]
• Ameletus exquisitus Eaton, 1885 [USA:NW]
• Ameletus falsus McDunnough, 1938 [USA:NW,SW]
  • Ameletus sp. C Allen & Chao, 1981 (syn.)
• Ameletus imbellis Day, 1952 [USA:NW,SW]
• Ameletus inopinatus Eaton, 1887 [CAN:FN;USA:FN;ASIA;EURO]
  • Ameletus alpinus Bengtsson, 1913 (syn.)
  • Ameletus eugenii Sinitshenkova & Varykhanova, 1989 (syn.)
• Ameletus janetae Kondratieff & Meyer, 2010 [USA:SE]
• Ameletus lineatus Traver, 1932 [CAN:NE;USA:NE,SE]
• Ameletus ludens Needham, 1905 [CAN:NE;USA:NE,SE]
• Ameletus majusculus Zloty, 1996 [CAN:NW;USA:NW,SW]
• Ameletus minimus Zloty & Harper, 1999 [USA:NW]
• Ameletus oregonensis McDunnough, 1933 [CAN:FN,NW;USA:NW]
• Ameletus pritchardi Zloty, 1996 [CAN:NW;USA:NW]
• Ameletus quadratus Zloty & Harper, 1999 [USA:NW]
• Ameletus shepherdi Traver, 1934 [CAN:NW;USA:NW,SW]
  • Ameletus querulus McDunnough, 1938 (syn.)
• Ameletus similior McDunnough, 1928 [CAN:NW;USA:NW,SW]
  • Ameletus monta Mayo, 1952 (syn.)
  • Ameletus montis Mayo, 1952 (syn.spell.)
• Ameletus sparsatus McDunnough, 1931 [CAN:FN,NW;USA:NW,SW]
  • Ameletus aequivocus McDunnough, 1934 (syn.)
• Ameletus subnotatus Eaton, 1885 [CAN:FN,NE,NW;USA:NE,NW,SW]
• Ameletus ubnotatus Eaton, 1885 (spell.)
• Ameletus suffusus McDunnough, 1936 [CAN:NW;USA:NW,SW]
• Ameletus tarteri Burrows, 1987 [USA:NE,SE]
• Ameletus tertius McDunnough, 1938 [CAN:NE;USA:NE,SE]
• Ameletus tolae Zloty, 1996 [USA:NW]
• Ameletus validus McDunnough, 1923 [CAN:NW;USA:FN,NW,SW]
• Ameletus vancouverensis McDunnough, 1933 [CAN:NW;USA:NW]
  • Ameletus facilis Day, 1952 (syn.)
• Ameletus velox Dodds, 1923 [CAN:FN,NW;USA:NW,SW]
  • Ameletus connectina McDunnough, 1939 (syn.)
  • Ameletus connectinus McDunnough, 1939 (syn.spell.)
  • Ameletus connectus McDunnough, 1936 (syn.)
• Ameletus vernalis McDunnough, 1924 [CAN:NW;USA:NW,SW]
• Ameletus walleyi Harper, 1970 [CAN:NE;USA:NE]

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AMETROPODIDAE

• Ametropus ammophilus Allen & Edmunds, 1976 [CAN:NW;USA:NW]
• Ametropus fragilis Albarda, 1878 [CAN:FN,NE,NW;USA:FN,NE,NW,SW;ASIA;EURO]
  • Ametropus albrighti Traver, 1935 (syn.)
  • Ametropus eatoni Brodsky, 1930 (syn.)
  • Ametropus neavei McDunnough, 1928 (syn.)

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ARTHROPLEIDAE

• Arthroplea bipunctata (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,SE]
  • Arthroplea bipuncata McDunnough, 1924 (spell.)
  • Cinygma bipunctata McDunnough, 1924 (orig.)

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BAETIDAE

• Acentrella alachua (Berner, 1940) [USA:SE]
  • Acentrella alahua (Berner, 1940) (spell.)
  • Baetis alachua (Berner, 1940) (comb.)
  • Plauditus alachua (Berner, 1940) (comb.)
  • Pseudocloeon alachua Berner, 1940 (orig.)
  • Pseudocloeon alahua Berner, 1940 (spell.)
• Acentrella barbarae Jacobus & McCafferty, 2006 [USA:NE,SE]
• Acentrella feropagus Alba-Tercedor & McCafferty, 2000 [CAN:FN,NE;USA:FN;ASIA]
  • Acenrella feropagus Alba-Tercedor & McCafferty, 2000 (spell.)
  • Acentrella lapponica Bengtsson, 1912 (id.)
  • Baetis feropagus (Alba-Tercedor & McCafferty, 2000)(comb.)
  • Baetis lapponicus (Bengtsson, 1912) (id.)
• Acentrella insignificans (McDunnough, 1926) [CAN:FN,NW;MEX:SW;USA:FN,NE,NW,SW]
  • Baetis insignificans McDunnough, 1926 (orig.)
• Acentrella lapponica Bengtsson, 1912 [CAN:FN,NW;USA:FN;ASIA;EURO]
  • Baetis lapponicus (Bengtsson, 1912) (comb.)
• Acentrella nadineae McCafferty, Waltz & Webb, 2009 [USA:NE,SE]
• Acentrella parvula (McDunnough, 1932) [CAN:NE,NW;USA:NE,NW,SE]
  • Baetis armillatus McCafferty & Waltz, 1990 (syn.)
  • Plauditus armillatus (McCafferty & Waltz, 1990) (syn.comb.)
  • Plauditus parvulus (McDunnough, 1932) (comb.)
  • Pseudocloeon parvulum McDunnough, 1932 (orig.)
• Acentrella rallatoma Burian & Myers, 2011 [USA:NE]
• Acentrella turbida (McDunnough, 1924) [CAN:FN,NE,NW;MEX:SW;USA:FN,NE,NW,SE,SW]
  • Acentrella carolina (Banks, 1924) (syn.)
  • Acentrella turbidae (McDunnough, 1924) (spell.)
  • Acentrella turbidae (McDunnough, 1924) (spell.)
  • Cloeon carolina Banks, 1924 (syn.)
  • Pseudocloeon carolina (Banks, 1924) (syn.)
  • Pseudocloeon turbidum McDunnough, 1924 (orig.)

• Acerpenna akataleptos (McDunnough, 1926) [CAN:NW]
  • Baetis akataleptos McDunnough, 1926 (orig.)
• Acerpenna macdunnoughi (Ide, 1937) [CAN:NE;USA:NE,SE]
  • Baetis macdunnoughi Ide, 1937 (orig.)
• Acerpenna pygmaea (Hagen, 1861) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Acerpenna sp. 1 McCafferty & Davis, 1992 (syn.)
  • Acerpenna harti (McDunnough, 1924) (syn.)
  • Baetis harti McDunnough, 1924 (syn.)
  • Baetis pygmaeus (Hagen, 1861) (comb.)
  • Baetis spiethi Berner, 1940 (syn.)
  • Cloe pygmaea Hagen, 1861 (orig.)

• Americabaetis intermedius (Lugo-Ortiz & McCafferty, 1994) [MEX:FS;CAMR]
  • Acerpenna intermedia Lugo-Ortiz & McCafferty, 1994 (orig.)
• Americabaetis lugoi Waltz & McCafferty, 1999 [MEX:FS;CAMR]
• Americabaetis pleturus (Lugo-Ortiz & McCafferty, 1994) [MEX:FS,SW;USA:SW;CAMR]
• Acerpenna pletura Lugo-Ortiz & McCafferty, 1994 (orig.)

• Anafroptilum album (McDunnough, 1926) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Centroptilum album McDunnough, 1926 (orig.)
  • Centroptilum convexum Ide, 1930 (syn.)
  • Centroptilum walshi McDunnough, 1929 (syn.)
  • Procloeon album (McDunnough, 1926) (comb.)
  • Procloeon convexum (Ide, 1930) (syn.)
  • Procloeon walshi (McDunnough, 1929) (comb.)
  • Procloeon sp. 2 McCafferty & Davis 1992 (syn.)
• Anafroptilum asperatum (Traver, 1935) [USA:NW,SW]
  • Centroptilum asperatum Traver, 1935 (orig.)
  • Centroptilum elsa Traver, 1935 (syn.)
  • Centroptilum oreophilum Edmunds, 1954 (syn.)
  • Procloeon asperatum (Traver, 1935) (comb.)
  • Procloeon elsa (Traver, 1935) (syn.)
  • Procloeon oreophilum (Edmunds, 1954) (syn.)
• Anafroptilum bifurcatum (McDunnough, 1924) [CAN:NE,NW;USA:NE,NW,SE]
  • Centroptilum bifurcatum McDunnough, 1924 (orig.)
  • Centroptilum selanderorum Edmunds, 1954 (syn.)
• Anafroptilum conturbatum (McDunnough, 1929) [CAN:NE,NW;USA:NE,NW,SW]
  • Centroptilum conterbatum (McDunnough, 1929) (spell.)
  • Centroptilum conturbatum (McDunnough, 1929) (orig.)
  • Procloeon conturbatum (McDunnough, 1929) (comb.)
• Anafroptilum minor (McDunnough, 1926) [CAN:NE;USA:NE,SE]
  • Centroptilum minor (McDunnough, 1926) (comb.)
  • Cloeon minor McDunnough, 1926 (orig.)
  • Cloeon minus McDunnough, 1926 (spell.)
  • Procloeon minor (McDunnough, 1926) (comb.)
• Anafroptilum ozarkense (Wiersema & Burian, 2000) [USA:SE]
• Centroptilum ozarkensum Wiersema & Burian, 2000 (orig.)
• Anafroptilum semirufum (McDunnough, 1926) [CAN:NE;USA:NE]
• Centroptilum semirufum McDunnough, 1926 (orig.)
• Anafroptilum victoriae (McDunnough, 1938)( [CAN:NE, NW; USA:NE]
• Centroptilum victoriae McDunnough, 1938 (orig.)

• Apobaetis etowah (Traver, 1935) [CAN:NW;MEX:SW;USA:NE,NW,SE,SW]
  • Apobaetis indeprensus Day, 1955 (syn.)
  • Pseudocloeon etowah Traver, 1935 (orig.)
• Apobaetis futilis (McDunnough, 1931) [CAN:NW;USA:SE,SW]
  • Baetis futile (McDunnough, 1931) (spell.)
  • Baetis futilis (McDunnough, 1931) (comb.)
  • Plauditus futilis (McDunnough, 1931) (comb.)
  • Pseudocloeon futile McDunnough, 1931 (orig.)
• Apobaetis lakota McCafferty, 2000 [USA:NE]

• Baetis adonis Traver, 1935 [MEX:SW;USA:NW,SW]
  • Baetis caelestis Allen & Murvosh, 1983 (syn.)
  • Baetis sp. A Morihara & McCafferty, 1979 (syn.)
• Baetis alius Day, 1954 [USA:NW]
  • Baetis moqui Wiersema, Nelson & Kuehnl, 2005 (syn.)
• Baetis bicaudatus Dodds, 1923 [CAN:FN,NW;USA:FN,NW,SW;ASIA;EURO]
  • Baetis minimus Dodds, 1923 (syn.)
• Baetis brunneicolor McDunnough, 1925 [CAN:FN,NE,NW;USA:FN,NE,NW,SE]
  • Baetis anachris Burks, 1953 (syn.)
  • Baetis hiemalis Leonard, 1950 (syn.)
  • Baetis phyllis Burks, 1953 (syn.)
• Baetis bundyae Lehmkuhl, 1973 [CAN:FN,NE,NW;GRE:FN;USA:FN,NE,NW;EURO]
  • Baetis bundyi Lehmkuhl, 1973 (spell.)
  • Baetis macani bundyae Lehmkuhl, 1973 (stat.)
  • Baetis tenax Eaton, 1870 (id.)
• Baetis diablus Day, 1954 [USA:NW]
• Baetis flavistriga McDunnough, 1921 [CAN:FN,NE,NW;MEX:FS,SW;USA:FN,NE,NW,SE,SW;CAMR]
  • Baetis caurinus Edmunds & Allen, 1957 (syn.)
  • Baetis levitans McDunnough, 1925 (syn.)
  • Baetis nanus McDunnough, 1923 (syn.)
  • Baetis ochris Burks, 1953 (syn.)
  • Baetis sinuosus Navas, 1924 (syn.)
• Baetis foemina McDunnough, 1936 [CAN:FN,NE;USA:FN;ASIA]
• Baetis hudsonicus Ide, 1937 [CAN:FN,NE,NW]
• Baetis intercalaris McDunnough, 1921 [CAN:NE,NW;USA:NE,NW,SE,SW]
  • Baetis lasallei Banks, 1924 (syn.)
• Baetis magnus McCafferty & Waltz, 1986 [MEX:FS,SW;USA:NW,SW;CAMR]
  • Baetis libos Allen & Murvosh, 1987 (syn.)
  • Baetis sp. B Morihara & McCafferty, 1979 (syn.)
• Baetis mimbresaurus (McCafferty, 2007) [USA:SW]
  • Moribaetis mimbresaurus McCafferty, 2007 (orig.)
• Baetis notos Allen & Murvosh, 1987 [MEX:FS;USA:NW,SE,SW]
  • Baetis sp. C Morihara & McCafferty, 1979 (syn.)
• Baetis palisadi Mayo, 1952 [USA:NW,SW]
• Baetis persecutus McDunnough, 1939 [CAN:NW]
  • Baetis persecuta McDunnough, 1939 (spell.)
  • Baetis persecutor McCafferty, 1997 (syn.)
• Baetis phoebus McDunnough, 1923 [CAN:NE,NW;USA:FN,NE,SE]
  • Baetis cingulatus McDunnough, 1925 (syn.)
  • Baetis pallidula McDunnough, 1924 (syn.)
  • Baetis pallidulus McDunnough, 1924 (syn.)
  • Baetis quebecensis Hubbard, 1974 (syn.)
• Baetis piscatoris Traver, 1935 [USA:NW,SW]
• Baetis pluto McDunnough, 1925 [CAN:NE;USA:NE,SE]
• Baetis posticatus (Say, 1823) (dub.) [USA:NE]
  • Cloe posticata (Say, 1823) (comb.)
  • Cloeon posticata Say, 1823 (orig.)
• Baetis rusticans McDunnough, 1925 [CAN:NE;USA:NE]
• Baetis tricaudatus Dodds, 1923 [CAN:FN,NE,NW;MEX:FS,SW;USA:FN,NE,NW,SE,SW]
  • Baetis incertans McDunnough, 1925 (syn.)
  • Baetis intermedius Dodds, 1923 (syn.)
  • Baetis jesmondensis McDunnough, 1938 (syn.)
  • Baetis moffati Dodds, 1923 (syn.spell.)
  • Baetis moffatti Dodds, 1923 (syn.)
  • Baetis sp. No. 1 Traver, 1932 (syn.)
  • Baetis parallela Banks, 1924 (spell.)
  • Baetis parallelus Banks, 1924 (syn.)
  • Baetis vagans McDunnough, 1925 (syn.)
• Baetis vernus Curtis, 1834 [CAN:FN,NW;ASIA;EURO]
  • Baetis finitimus Eaton, 1871 (syn.)
  • Baetis tenax Eaton, 1870 (syn.)
  • Cloe verna (Curtis, 1834) (comb.)
  • Ephemera dubia Stephens, 1836 (syn.)
  • Ephemera phaeops Stephens, 1836 (syn.)
  • Vernobaetis vernus (Curtis, 1834) (unavail. comb.)

• Baetodes adustus Cohen & Allen, 1972 [MEX:FS;CAMR]
• Baetodes alleni McCafferty & Provonsha, 1993 [USA:SW]
• Baetodes arizonensis Koss, 1972 [USA:SW]
  • Baetodes sigillatus Allen & Chao, 1972 (syn.)
• Baetodes bibranchius McCafferty & Provonsha, 1993 [MEX:FS,SW;USA:NW,SW;CAMR]
• Baetodes caritus Cohen & Allen, 1972 [MEX:SW,FS;CAMR]
  • Baetodes veracrusensis Mayo, 1972 (syn.)
• Baetodes deficiens Cohen & Allen, 1972 [MEX:FS,SW;USA:SW;CAMR]
  • Baetodes bellus Mayo, 1972 (syn.)
• Baetodes edmundsi Koss, 1972 [MEX:SW;USA:NW,SW]
• Baetodes fortinensis Mayo, 1972 [MEX:FS]
• Baetodes fuscipes Cohen & Allen, 1972 [MEX:FS,SW;CAMR]
  • Baetodes furvus Mayo, 1973 (syn.)
• Baetodes inermis Cohen & Allen, 1972 [MEX:FS,SW;USA:SW;CAMR]
• Baetodes longus Mayo, 1973 [MEX:SW;CAMR]
• Baetodes obesus Mayo, 1972 [MEX:FS]
• Baetodes pallidus Cohen & Allen, 1972 [MEX:FS;CAMR]
• Baetodes pictus Cohen & Allen, 1972 [MEX:FS,SW]
• Baetodes tritus Cohen & Allen, 1972 [MEX:FS,SW;CAMR]
• Baetodes velmae Cohen & Allen, 1978 [MEX:SW;CAMR]

• Baetopus trishae Waltz, 2002 [USA:SE]

• Barbaetis benfieldi Kennedy, 1985 [USA:SE]

• Callibaetis californicus Banks, 1900 [MEX:FS,SW;USA:NW,SW]
• Callibaetis distinctus Lugo-Ortiz & McCafferty, 1996 [MEX:SW]
• Callibaetis ferrugineus ferrugineus (Walsh, 1862) [CAN:FN,NE;USA:NE,SE]
  • Baetis ferrugineus (Walsh, 1862) (comb.)
  • Callibaetis ferrugineus (Walsh, 1862) (comb.)
  • Cloe ferruginea Walsh, 1862 (orig.)
• Callibaetis ferrugineus hageni Eaton, 1885 [CAN:FN,NW;USA:FN,NW,SW]
  • Baetis tessellata Hagen, 1861 (hom.: B. tessellata Walker, 1853)
  • Callibaetis americanus Banks, 1900 (syn.)
  • Callibaetis carolus Traver, 1935 (syn.)
  • Callibaetis coloradensis Banks, 1900 (syn.)
  • Callibaetis evergreenensis Thew, 1959 (syn.)
  • Callibaetis fusca Dodds, 1923 (syn., spell.)
  • Callibaetis fuscus Dodds, 1923 (syn.)
  • Callibaetis hageni Eaton, 1885 (orig.)
  • Callibaetis hebes Upholt, 1936 (syn.)
  • Callibaetis nigritus Banks, 1918 (syn.)
  • Callibaetis tessellatus (Hagen, 1861) (hom.comb.)
• Callibaetis floridanus Banks, 1900 [MEX:FS,SW;USA:NE,SE,SW;CAMR]
  • Callibaetis completa Banks, 1930 (syn.)
• Callibaetis fluctuans (Walsh, 1862) [CAN:NE;USA:FN,NE,NW,SE,SW]
  • Baetis fluctuans (Walsh, 1862) (comb.)
  • Callibaetis traverae Upholt, 1937 (syn.)
  • Cloe fluctuans Walsh, 1862 (orig.)
• Callibaetis montanus Eaton, 1885 [MEX:FS,SW;USA:SW;CAMR]
  • Callibaetis montanus montanus Eaton, 1885 (stat.)
• Callibaetis pallidus Banks, 1900 [CAN:FN,NE,NW;USA:NE,NW,SW]
  • Callibaetis semicostatus Banks, 1914 (syn.)
• Callibaetis pictus (Eaton, 1871) [MEX:FS,SW;USA:NE,NW,SW;CAMR]
  • Baetis pictus Eaton, 1871 (orig.)
  • Callibaetis centralis Peters, 1959 (syn.)
  • Callibaetis doddsi Traver, 1935 (syn.)
  • Callibaetis pacificus Seemann, 1927 (syn.)
  • Callibaetis signatus Banks, 1918 (syn.)
  • Callibaetis vitrea Dodds, 1923 (syn.)
• Callibaetis pretiosus Banks, 1914 [CAN:NE;USA:NE,SE]
• Callibaetis punctilusus McCafferty & Provonsha, 1993 [MEX:FS,SW;USA:SW;CAMR]
  • Callibaetis montanus punctilusus McCafferty & Provonsha, 1993 (orig.)
• Callibaetis skokianus Needham, 1903 [CAN:NE,NW;USA:NE]
  • Callibaetis brevicostatus Daggy, 1945 (syn.)
• Callibaetis undatus (Pictet, 1843) (dub.) [MEX:FS]
  • Cloe undata Pictet, 1843 (orig.)
  • Cloeon undata (Pictet, 1843) (comb.)

• Camelobaetidius arriaga (Traver & Edmunds, 1968) [MEX:FS;CAMR]
  • Dactylobaetis arriaga Traver & Edmunds, 1968 (orig.)
  • Dactylobaetis chiapas Traver & Edmunds, 1968 (syn.)
  • Dactylobaetis jenseni Traver & Edmunds, 1968 (syn.)
  • Camelobaetidius chiapas (Traver & Edmunds, 1968) (syn.)
  • Camelobaetidius jenseni (Traver & Edmunds, 1968) (syn.)
• Camelobaetidius kickapoo McCafferty, 2000 [MEX:FS,SW;USA:NW,SW]
  • Camelobaetidius sp. 1 McCafferty & Davis, 1992 (orig.)
• Camelobaetidius maidu Jacobus & McCafferty, 2005 [MEX:FS,SW;USA:NW,SW]
• Camelobaetidius mexicanus (Traver & Edmunds, 1968) [MEX:FS,SW;USA:NW,SW;CAMR]
  • Camelobaetidius mexicanum (Traver & Edmunds, 1968) (spell.)
  • Dactylobaetis mexicanus Traver & Edmunds, 1968 (orig.)
• Camelobaetidius musseri (Traver & Edmunds, 1968) [MEX:FS,SW;USA:SE,SW;CAMR]
  • Camelobaetidius salinas (Allen & Chao, 1978) (spell.)
  • Camelobaetidius salinus (Allen & Chao, 1978) (syn.)
  • Camelobaetidius sinaloa (Allen & Murvosh, 1987) (syn.)
  • Dactylobaetis musseri Traver & Edmunds, 1968 (orig.)
  • Dactylobaetis salinus Allen & Chao, 1978 (syn.)
  • Dactylobaetis sinaloa Allen & Murvosh, 1987 (syn.)
• Camelobaetidius shepardi Randolph & McCafferty, 2001 [MEX:FS;CAMR]
• Camelobaetidius variabilis Wiersema, 1998 [MEX:SW;USA:SW;CAMR]
• Camelobaetidius waltzi McCafferty, 1994 [USA:NE,SW]
• Camelobaetidius warreni (Traver & Edmunds, 1968) [CAN:NW;MEX:FS,SW;USA:NE,NW,SW;CAMR]
  • Camelobaetidius cepheus (Traver & Edmunds, 1968) (syn.)
  • Camelobaetidius navis (Allen & Chao, 1978) (syn.)
  • Camelobaetidius similis Lugo-Ortiz & McCafferty, 1995 (syn.)
  • Camelobaetidius trivialis (Allen & Chao, 1978) (syn.)
  • Camelobaetidius zenobia (Traver & Edmunds, 1968) (syn.)
  • Dactylobaetis cepheus Traver & Edmunds, 1968 (syn.)
  • Dactylobaetis navis Allen & Chao, 1978 (syn.)
  • Dactylobaetis trivialis Allen & Chao, 1978 (syn.)
  • Dactylobaetis warreni Traver & Edmunds, 1968 (orig.)
  • Dactylobaetis zenobia Traver & Edmunds, 1968 (syn.)

• Caribaetis macaferti (Waltz, 1985) [MEX:FS,CAMR]
• Moribaetis macaferti Waltz, 1985 (orig.)

• Cloeodes excogitatus Waltz & McCafferty, 1987 [MEX:FS,SW;USA:NW,SW;CAMR]
• Cloeodes macrolamellus Waltz & McCafferty, 1987 [MEX:SW;USA:SW]
• Cloeodes peninsulus Waltz & McCafferty, 1987 [MEX:SW;USA:SW]
• Cloeodes waltzi Wiersema & Baumgardner, 2000 [MEX:SW]

• Cloeon dipterum (Linnaeus, 1761) [CAN:NE,NW;USA:FN,NE,SE;AFRI;ASIA;EURO;SAMR]
  • Caenis sinensis Walker, 1853 (syn.)
  • Chloeon dimidiatum (Curtis, 1834) (syn.)
  • Chloeon dipterum (Linnaeus, 1761) (comb.)
  • Cloe affinis Rambur, 1842 (syn.)
  • Cloe apicalis Costa, 1882 (syn.)
  • Cloe diptera (Linnaeus, 1761) (comb.)
  • Cloeon cognatum Stephens, 1836 (syn.)
  • Cloeon consobrinum Stephens, 1836 (syn.)
  • Cloeon dimidiapum Curtis, 1834 (syn.)
  • Cloeon inscriptum Bengtsson, 1914 (syn.)
  • Cloeon marmoratum Curtis, 1834 (nom. nud.)
  • Cloeon obscurum Curtis, 1834 (syn.)
  • Cloeon pallida Leach, 1815 (syn.)
  • Cloeon robustum Bogoescu, 1933 (syn.)
  • Cloeon szegedi Jacob, 1969 (syn.)
  • Cloeon virgo Stephens, 1836 (syn.)
  • Cloeon zimini Tshernova, 1931 (syn.)
  • Cloeopsis diptera (Linnaeus, 1761) (comb.)
  • Ephemera annulata Muller, 1776 (syn.)
  • Ephemera diptera Linnaeus, 1761 (orig.)
  • Ephemera rufula Muller, 1776 (syn.)
  • Ephemera striata Muller, 1776 (syn.)

• Diphetor hageni (Eaton, 1885) [CAN:FN,NE,NW;USA:FN,NE,NW,SE,SW]
  • Baetis devinctus Traver, 1935 (syn.)
  • Baetis hageni Eaton, 1885 (renam.)
  • Baetis herodes Burks, 1953 (syn.)
  • Baetis parvus Dodds, 1923 (syn.)
  • Baetis unicolor (Hagen, 1861) (hom.comb.)
  • Cloe unicolor Hagen, 1861 (hom.: C. unicolor Curtis, 1834)
  • Diphetor devinctus (Traver, 1935) (syn.)

• Fallceon eatoni (Kimmins, 1934) [MEX:SW;USA:SW]
  • Baetis eatoni Kimmins, 1934 (orig.)
• Fallceon fortipalpus Lugo-Ortiz & McCafferty, 1994 [MEX:SW;CAMR]
• Fallceon quilleri (Dodds, 1923) [CAN:NE,NW;MEX:FS,SW;USA:NE,NW,SE,SW;CAMR]
  • Baetis buenoi Allen, 1985 (syn.)
  • Baetis byblis Allen & Murvosh, 1983 (syn.)
  • Baetis cleptis Burks, 1953 (syn.)
  • Baetis endymion Traver, 1935 (syn.)
  • Baetis erebus Traver, 1935 (syn.)
  • Baetis leechi Day, 1954 (syn.)
  • Baetis quilleri Dodds, 1923 (orig.)
  • Fallceon buenoi (Allen, 1985) (syn.)
  • Fallceon byblis (Allen & Murvosh, 1983) (syn.)
• Fallceon sageae McCafferty, 2008 [MEX:FS;CAMR]
• Fallceon sonora (Allen & Murvosh, 1987) [MEX:SW;USA:NW,SW]
  • Baetis sonora Allen & Murvosh, 1987 (orig.)
• Fallceon thermophilos (McDunnough, 1926) [USA:NW]
  • Acerpenna sulfurosa (Day, 1954) (syn.)
  • Acerpenna sulfurosus (Day, 1954) (syn. spell)
  • Acerpenna thermophilos (McDunnough, 1926) (comb.)
  • Baetis sulfurosus Day, 1954 (syn.)
  • Baetis thermophilos McDunnough, 1926 (orig.)
  • Fallceon sulfurosus (Day, 1954) (syn.)

• Heterocloeon amplum (Traver, 1932) [MEX:SW;USA:NE,SE,SW]
  • Acentrella ampla Traver, 1932 (orig.)
  • Baetis amplus (Traver, 1932) (comb.)
• Heterocloeon berneri (Muller-Liebenau, 1974) [USA:SE]
  • Rheobaetis berneri Muller-Liebenau, 1974 (orig.)
• Heterocloeon curiosum (McDunnough, 1923) [CAN:NE;USA:NE,SE]
  • Baetis curiosus (McDunnough, 1923) (comb.)
  • Centroptilum curiosum McDunnough, 1923 (orig.)
  • Rheobaetis traverae Muller-Liebenau, 1974 (syn.)
• Heterocloeon frivolum (McDunnough, 1925) [CAN:NE;USA:NE,NW,SE]
  • Baetis frivolus McDunnough, 1925 (orig.)
  • Heterocloeon frivolus (McDunnough, 1925) (spell.)
• Heterocloeon grande (Wiersema & Long, 2000) [USA:SE]
  • Plauditus grandis Wiersema & Long, 2000 (orig.)
• Heterocloeon petersi (Muller-Liebenau, 1974) [USA:SE]
  • Rheobaetis petersi Muller-Liebenau, 1974 (orig.)

• Iswaeon anoka (Daggy, 1945) [CAN:NE,NW;USA:NE,NW,SE]
  • Heterocloeon anoka (Daggy, 1945) (comb.)
  • Pseudocloeon anoka Daggy, 1945 (orig.)
  • Pseudocloeon edmundsi Jensen, 1969 (syn.)
• Iswaeon davidi (Waltz & McCafferty, 2005) [USA:SE]
  • Heterocloeon davidi Waltz & McCafferty, 2005 (orig.)
• Iswaeon rubrolaterale (McDunnough, 1931) [CAN:NW;USA:NW,SE]
  • Baetis rubrolaterale (McDunnough, 1931) (spell.)
  • Baetis rubrolateralis (McDunnough, 1931) (comb.)
  • Heterocloeon rubrolaterale (McDunnough, 1931) (comb.)
  • Plauditus rubrolateralis (McDunnough, 1931) (comb.)
  • Pseudocloeon rubrolaterale McDunnough, 1931 (orig.)

• Kirmaushenkreena zarankoae McCafferty, 2011 [CAN:FN]

• Labiobaetis apache McCafferty & Waltz, 1995 [USA:NW,SW]
  • Pseudocloeon apache (McCafferty & Waltz, 1995) (comb.)
• Labiobaetis dardanus (McDunnough, 1923) [CAN:NE,NW;USA:FN,NE,NW,SE,SW]
  • Baetis dardanus McDunnough, 1923 (orig.)
  • Baetis elachistus Burks, 1953 (syn.)
  • Pseudocloeon dardanum (McDunnough, 1923) (comb.)
• Labiobaetis ephippiatus (Traver, 1935) [CAN:NE;MEX:SW;USA:NE,SE,SW]
  • Acentrella ephippiatus (Traver, 1935) (comb., spell.)
  • Baetis ephippiatus Traver, 1935 (orig.)
  • Pseudocloeon ephippiatum (Traver, 1935) (comb.)
• Labiobaetis frondalis (McDunnough, 1925) [CAN:NE;USA:NE,SE]
  • Baetis australis Traver, 1932 (syn.)
  • Baetis baeticatus Burks, 1953 (syn.)
  • Baetis frondalis McDunnough, 1925 (orig.)
  • Pseudocloeon frondale (McDunnough, 1925) (comb.)
• Labiobaetis longipalpus (Morihara & McCafferty, 1979) [CAN:NE;USA:NE,SE]
  • Baetis longipalpus Morihara & McCafferty, 1979 (orig.)
  • Pseudocloeon longipalpus (Morihara & McCafferty, 1979) (comb.)
• Labiobaetis propinquus (Walsh, 1863) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Acentrella propinquus (Walsh, 1863) (comb.,spell.)
  • Baetis propinguus (Walsh, 1863)(comb.,spell.)
  • Baetis propinquus (Walsh, 1863) (comb.)
  • Baetis spinosus McDunnough, 1925 (syn.)
  • Cloe propinqua Walsh, 1863 (renam.)
  • Cloe vicina Walsh, 1862 (hom. C. vicina Hagen, 1861)
  • Pseudocloeon propinquum (Walsh, 1863) (comb.)
• Labiobaetis sonajuventus Webb, 2013 [USA:NW]

• Moribaetis latipennis Kluge & Bernal Vega, 2018 [MEX:FS;CAMR]
• Moribaetis salvini (Eaton, 1885) [MEX:FS;CAMR]
  • Baetis salvini Eaton, 1885 (orig.)

• Neocloeon alamance Traver, 1932 [USA:NE,SE]
• Centroptilum alamance (Traver, 1932) (comb.)
• Cloeon alamance (Traver, 1932) (comb.)
• Neocloeon triangulifer (McDunnough, 1931) [CAN:NE;USA:NE,SE,SW]
• Centroptilum triangulifer (McDunnough, 1931) (comb.)
• Centroptilum sp. 1 McCafferty & Davis, 192 (syn.)
• Cloeon triangulifer McDunnough, 1931 (orig.)
• Cloeon triangulifera McDunnough, 1931 (spell.)

• Paracloeodes fleeki McCafferty & Lenat, 2004 [USA:NE,SE]
• Paracloeodes lotor Cruz, Usher & Jacobus, 2017 [USA:NE]
• Paracloeodes lugoi Randolph & McCafferty, 2000 [MEX:FS]
• Paracloeodes minutus (Daggy, 1945) [CAN:NE;MEX:SW;USA:NE,NW,SE,SW;CAMR]
  • Paracloeodes abditus Day, 1955 (syn.)
  • Pseudocloeon minutum Daggy, 1945 (orig.)

• Plauditus bimaculatus (Berner, 1946) [USA:SE]
  • Baetis bimaculatus (Berner, 1946) (comb.)
  • Pseudocloeon bimaculatum Berner, 1946 (orig.)
  • Pseudocloeon bimaculatus Berner, 1946 (spell.)
• Plauditus cestus (Provonsha & McCafferty, 1982) [CAN:FN,NE,NW;USA:NE,NW,SE]
• Barbaetis cestus (Provonsha & McCafferty, 1982)(comb.)
• Pseudocloeon cestum Provonsha & McCafferty, 1982 (orig.)
• Plauditus cingulatus (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Baetis cinctutus McCafferty & Waltz, 1990 (syn.)
  • Plauditus cinctutus (McCafferty & Waltz, 1990) (syn.comb.)
  • Pseudocloeon cingulatum McDunnough, 1931 (orig.)
• Plauditus dubius (Walsh, 1862) [CAN:FN,NE,NW;USA:FN,NE,NW,SE]
  • Baetis dubius (Walsh, 1862) (comb.)
  • Cloe dubia Walsh, 1862 (orig.)
  • Cloeon chlorops McDunnough, 1923 (syn.)
  • Cloeon dubium (Walsh, 1862) (comb.)
  • Pseudocloeon chlorops (McDunnough, 1923) (syn.)
  • Pseudocloeon dubium (Walsh, 1862) (comb.)
• Plauditus elliotti (Daggy, 1945) [CAN:NE;USA:NE]
  • Baetis elliotti (Daggy, 1945) (comb.)
  • Plauditus ellioti (Daggy, 1945) (spell.)
  • Pseudocloeon elliotti Daggy, 1945 (orig.)
  • Pseudocloeon ida Daggy, 1945 (syn.)
• Plauditus gloveri McCafferty & Waltz, 1998 [CAN:FN,NE,NW;USA:NE,NW,SE]
• Plauditus punctiventris (McDunnough, 1923) [CAN:NE,NW;USA:NE,SE,SW]
  • Baetis punctiventris (McDunnough, 1923) (comb.)
  • Baetis sp. 1 McCafferty & Davis, 1992 (syn.)
  • Cloeon punctiventris McDunnough, 1923 (orig.)
  • Pseudocloeon myrsum Burks, 1953 (syn.)
  • Pseudocloeon punctiventris (McDunnough, 1923) (comb.)
• Plauditus texanus Wiersema, 1999 [USA:SW]
• Plauditus veteris (McDunnough, 1924) [USA:NE,SE]
  • Baetis veteris (McDunnough, 1924) (comb.)
  • Pseudocloeon veteris McDunnough, 1924 (orig.)
• Plauditus virilis (McDunnough, 1923) [CAN:FN,NE,NW;MEX:SW;USA:NE,NW,SE,SW]
  • Acentrella sp. 1 Lugo-Ortiz & McCafferty, 1995 (syn.)
  • Acentrella sp. 2 Lugo-Ortiz & McCafferty, 1995 (syn.)
  • Baetis virile (McDunnough, 1923) (comb.spell.)
  • Baetis virilis (McDunnough, 1923) (comb.)
  • Cloeon virilis McDunnough, 1923 (orig.)
  • Pseudocloeon virile (McDunnough, 1923) (comb.)
  • Pseudocloeon virilis (McDunnough, 1923) (comb.spell.)

• Procloeon bellum (McDunnough, 1924) [CAN:NE,NW;USA:NE]
  • Centroptilum bellum McDunnough, 1924 (orig.)
• Procloeon caliginosum (McDunnough, 1925) [CAN:NE]
  • Centroptilum caliginosum McDunnough, 1925 (orig.)
• Procloeon fragile (McDunnough, 1923) [CAN:NE;USA:NE,SE]
  • Centroptilum fragile McDunnough, 1923 (orig.)
• Procloeon inanum (McDunnough, 1924) [CAN:NE,NW]
  • Cloeon inanum McDunnough, 1924 (orig.)
• Procloeon ingens (McDunnough, 1923) [CAN:FN,NE,NW;USA:NE,NW]
  • Cloeon implicatum McDunnough, 1924 (syn.)
  • Cloeon ingens McDunnough, 1923 (orig.)
  • Procloeon implicatum (McDunnough, 1924) (syn.)
• Procloeon insignificans (McDunnough, 1925) [CAN:NE]
  • Cloeon insignificans McDunnough, 1925 (orig.)
• Procloeon intermediale (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Centroptilum intermediale McDunnough, 1931 (orig.)
• Procloeon mendax (Walsh, 1862) [CAN:NE,NW;USA:NE]
  • Cloe mendax Walsh, 1862 (orig.)
  • Cloeon mendax (Walsh, 1862) (comb.)
• Procloeon nelsoni Wiersema, 1999 [USA:SE,SW]
• Procloeon diabolum Baumgardner & Kennedy (in Wiersema), 1999 (nom.nud.)
• Procloeon sp. 3 McCafferty & Davis, 1992 (syn.)
• Procloeon ozburni (McDunnough, 1924) [CAN:NE;USA:NE]
  • Centroptilum ozburni McDunnough, 1924 (orig.)
• Procloeon pennulatum (Eaton, 1870) [CAN:FN,NE,NW;USA:FN,NE,NW,SE,SW;ASIA;EURO]
  • Centroptilum infrequens McDunnough, 1924 (syn.)
  • Centroptilum pennulatum Eaton, 1870 (orig.)
  • Cloeoptilum pennulatum (Eaton, 1870) (unavail. comb.)
  • Pseudocentroptilum pennulatum (Eaton, 1870) (comb.)
• Procloeon quaesitum (McDunnough, 1931) [CAN:NE,NW;USA:NE,SE]
  • Centroptilum quaesitum McDunnough, 1931 (orig.)
• Procloeon rivulare (Traver, 1935) [CAN:NE;USA:NE,NW,SE,SW]
  • Centroptilum rivulare Traver, 1935 (orig.)
• Procloeon rubropictum (McDunnough, 1923) [CAN:NE,NW;USA:NE,SE]
  • Cloeon rubropictum McDunnough, 1923 (orig.)
• Procloeon rufostrigatum (McDunnough, 1924) [CAN:NE,NW;USA:NE,SE]
  • Centroptilum bistrigatum Daggy, 1945 (syn.)
  • Centroptilum hobbsi Berner, 1941 (syn.)
  • Centroptilum rufostrigatum McDunnough, 1924 (orig.)
  • Procloeon hobbsi (Berner, 1941) (syn.)
• Procloeon simile (McDunnough, 1924) [CAN:NE;USA:NE,SE]
  • Centroptilum simile McDunnough, 1924 (orig.)
  • Centroptilum similie McDunnough, 1924 (spell.)
• Procloeon simplex (McDunnough, 1925) [CAN:NE,NW;USA:NE,SE]
  • Cloeon simplex McDunnough, 1925 (orig.)
• Procloeon texanum McCafferty & Provonsha, 1993 [USA:NE,SW]
  • Procloeon distinctum Wiersema, 1999 (syn.)
• Procloeon venosum (Traver, 1935) [USA:NW,SW]
  • Centroptilum venosum Traver, 1935 (orig.)
• Procloeon vicinum (Hagen, 1861) [CAN:NE;USA:SE]
  • Cloe vicina Hagen, 1861 (orig.)
  • Cloeon vicinum Hagen, 1861 (emend.)
• Procloeon viridoculare (Berner, 1940) [CAN:NE,NW;USA:NE,NW,SE,SW]
  • Centroptilum viridocularis Berner, 1940 (orig.)
  • Procloeon irrubrum Lowen & Flannagan, 1992 (syn.)
  • Procloeon viridocularis (Berner, 1940) (comb., spell.)

• Pseudocentroptiloides morihari Wiersema & McCafferty, 1998 [USA:NE,SW]
  • Centroptilum sp. 2 McCafferty & Davis, 1992 (syn.)
• Pseudocentroptiloides usa Waltz & McCafferty, 1989 [CAN:NE;USA:NE,SE]

• Varipes lasiobrachius Lugo-Ortiz & McCafferty, 1998 [MEX:FS;SAMR]

• Waynokiops dentatogriphus Hill, Pfeiffer & Jacobus, 2010 [USA:NE,SE]

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BAETISCIDAE

• Baetisca becki Schneider & Berner, 1963 [USA:SE]
• Baetisca berneri Tarter & Kirchner, 1978 [USA:NE,SE]
• Baetisca callosa Traver, 1931 (dub.) [CAN:NE;USA:SE]
• Baetisca carolina Traver, 1931 [CAN:NE;USA:NE,SE]
  • Baetisca thomsenae Traver, 1937 (syn.)
• Baetisca columbiana Edmunds, 1960 [CAN:NW;USA:NW]
• Baetisca escambiensis Berner, 1955 [USA:SE]
• Baetisca gibbera Berner, 1953 [USA:SE]
• Baetisca lacustris McDunnough, 1932 [CAN:FN,NE,NW;USA:NE,NW,SE]
  • Baetisca bajkovi Neave, 1934 (syn.)
• Baetisca laurentina McDunnough, 1932 [CAN:FN,NE,NW;USA:NE,SE]
• Baetisca obesa (Say, 1839) [CAN:FN,NE;USA:NE,SE]
  • Baetis obesa Say, 1839 (orig.)
• Baetisca rogersi Berner, 1940 [USA:SE]
• Baetisca rubescens (Provancher, 1878) [CAN:NE;USA:NE,SE]
  • Baetis rubescens (Provancher, 1878) (comb.)
  • Cloe rubescens Provancher, 1878 (orig.)

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BEHNINGIIDAE

• Dolania americana Edmunds & Traver, 1959 [USA:NE,SE]

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CAENIDAE

• Amercaenis cusabo Provonsha & McCafferty, 2006 [USA:SE]
• Amercaenis ridens (McDunnough, 1931) [USA:NE,NW,SW]
  • Caenis ridens McDunnough, 1931 (orig.)

• Brachycercus berneri Soldan, 1986 [USA:SE]
  • Brachycercus floridicola Soldan, 1986 (syn.)
  • Brachycercus sp. A Berner, 1950 (syn.)
• Brachycercus harrisellus Curtis, 1834 [CAN:NE,NW;USA:FN,NE,NW;ASIA;EURO]
  • Brachycercus arcticus Soldan, 1986 (syn.)
  • Brachycercus edmundsi Soldan, 1986 (syn.)
  • Brachycercus harisella Curtis, 1834 (spell.)
  • Brachycercus harrisella Curtis, 1834 (spell.)
  • Brachycercus harrisii Curtis, 1837 (obj. syn.)
  • Brachycercus magnus Tshernova, 1952 (syn.)
  • Brachycercus pallidus Tshernova, 1928 (syn.)
  • Brachycercus YUa Quan, Bae, Jung & Lee, 2002 (syn.)
  • Caenis harrisella (Curtis, 1834) (comb.)
  • Caenis pennata Stephens, 1835 (syn.)
  • Eurycaenis harrisella (Curtis, 1834) (comb.)
• Brachycercus nitidus (Traver, 1932) [CAN:NE;USA:NE,SE]
  • Eurycaenis nitida Traver, 1932 (orig.)
• Brachycercus ojibwe Sun & McCafferty, 2008 [CAN:NE;USA:NE]

• Caenis amica Hagen, 1861 [CAN:FN,NE,NW;MEX:SW;USA:FN,NE,NW,SE,SW]
  • Caenis simulans McDunnough, 1931 (syn.)
• Caenis anceps Traver, 1935 [CAN:NE;MEX:FS;USA:NE,SE]
• Caenis arwini McCafferty & Davis, 2001 [USA:SW]
• Caenis bajaensis Allen & Murvosh, 1983 [MEX:FS,SW;USA:NW,SW;CAMR]
• Caenis candida Harper & Harper, 1981 [CAN:NE]
• Caenis diminuta diminuta Walker, 1853 [CAN:NE;USA:NE,SE]
  • Caenis diminuta Walker, 1853 (orig.)
• Caenis eglinensis Pescador & Richard, 2006 [USA:SE]
• Caenis hilaris (Say, 1839) [CAN:NE,NW;USA:NE,SE,SW]
  • Ephemera hilaris Say, 1839 (orig.)
• Caenis latipennis Banks, 1907 [CAN:FN,NE,NW;MEX:FS,SW;USA:NE,NW,SE,SW]
  • Caenis delicata Traver, 1935 (syn.)
  • Caenis forcipata McDunnough, 1931 (syn.)
  • Caenis gigas Burks, 1953 (syn.)
  • Caenis jocosa McDunnough, 1931 (syn.)
• Caenis macafferti Provonsha, 1990 [USA:NE,SE]
• Caenis nigropunctata Klapalek, 1905 [USA:HI;ASIA] (intro.)
• Caenis punctata McDunnough, 1931 [CAN:NE;MEX:SW;USA:NE,NW,SE,SW]
• Caenis tardata McDunnough, 1931 [CAN:FN,NE,NW;USA:NE,NW,SE]
• Caenis youngi Roemhild, 1984 [CAN:FN,NE,NW;USA:FN,NE,NW,SW]

• Cercobrachys cree Sun, Webb & McCafferty, 2002 [CAN:NW;USA:NE,NW]
• Cercobrachys etowah Soldan, 1986 [USA:NE,SE]
• Cercobrachys fox Sun & McCafferty, 2008 [USA:NE]
• Cercobrachys sp. A Guenther & McCafferty, 2005 (syn.)
• Cercobrachys lilliei Sun & McCafferty, 2008 [USA:NE]
• Cercobrachys pomeiok Sun & McCafferty, 2008 [USA:SE]
• Cercobrachys serpentis Soldan, 1986 [USA:NE,NW]
• Cercobrachys winnebago Sun & McCafferty, 2008 [USA:NE,SW]

• Latineosus cibola Sun & McCafferty, 2008 [MEX:SW;USA:SW]

• Sparbarus choctaw Sun & McCafferty, 2008 [USA:SE]
• Sparbarus coushatta Sun & McCafferty, 2008 [USA:SE,SW]
• Sparbarus flavus (Traver, 1935) (dub.) [USA:SE]
  • Brachycercus flavus Traver, 1935 (orig.)
• Sparbarus lacustris (Needham, 1918) [CAN:NE;USA:NE,SE,SW]
  • Brachycercus idei (Lestage, 1931) (syn.)
  • Brachycercus lacustris (Needham, 1918) (comb.)
  • Brachycercus pallidus (Ide, 1930) (syn.)
  • Caenis lacustris Needham, 1918 (orig.)
  • Eurycaenis idei Lestage, 1931 (syn.)
  • Eurycaenis lacustris (Needham, 1918) (comb.)
  • Eurycaenis pallida Ide, 1930 (syn.)
• Sparbarus maculatus (Berner, 1946) [CAN:NE;USA:NE,SE,SW]
  • Brachycercus maculatus Berner, 1946 (orig.)
  • Brachycercus pini Soldan, 1986 (syn.)
• Sparbarus miccosukee Sun & McCafferty, 2008 [USA:SE]
• Sparbarus nasutus (Soldan, 1986) [USA:NE,SE]
  • Brachycercus nasutus Soldan, 1986 (orig.)

• Susperatus prudens (McDunnough, 1931) [CAN:NW;USA:NE,NW,SE]
  • Brachycercus prudens (McDunnough, 1931) (comb.)
  • Eurycaenis prudens McDunnough, 1931 (orig.)
• Susperatus tonkawa Sun & McCafferty, 2008 [USA:NW,SW]
• Susperatus tuberculatus (Soldan, 1986) [USA:NW]
  • Brachycercus tuberculatus Soldan, 1986 (orig.)
  • Susperatus tuberculata (Soldan, 1986) (spell.)

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EPHEMERELLIDAE

• Attenella attenuata (McDunnough, 1925) [CAN:NE;USA:NE,SE]
  • Ephemerella attenuata McDunnough, 1925 (orig.)
  • Ephemerella hirsuta Berner, 1946 (syn.)
• Attenella delantala (Mayo, 1952) [USA:NW,SW]
  • Ephemerella delantala Mayo, 1952 (orig.)
• Attenella margarita (Needham, 1927) [CAN:FN?,NE,NW;USA:NE,NW,SE,SW]
  • Ephemerella margarita Needham, 1927 (orig.)
• Attenella soquele (Day, 1954) [USA:NW,SW]
  • Ephemerella soquele Day, 1954 (orig.)

• Caudatella edmundsi (Allen, 1959) [USA:NW,SW]
  • Ephemerella edmundsi Allen, 1959 (orig.)
• Caudatella columbiella (McDunnough, 1935) [CAN:NW;USA:NW,SW]
  • Caudatella heterocaudata californica (Allen & Edmunds, 1961) (syn.)
  • Ephemerella columbiella McDunnough, 1935 (orig.)
  • Ephemerella heterocaudata californica Allen & Edmunds, 1961 (syn.)
• Caudatella heterocaudata (McDunnough, 1929) [USA:NW]
  • Caudatella heterocaudata circia (Allen & Edmunds, 1961) (syn.)
  • Caudatella heterocaudata heterocaudata (McDunnough, 1929) (stat.)
  • Ephemerella heterocaudata circia Allen & Edmunds, 1961 (syn.)
  • Ephemerella heterocaudata heterocaudata McDunnough, 1929 (stat.)
• Caudatella hystrix (Traver, 1934) [CAN:NW;USA:NW,SW]
  • Caudatella cascadia (Allen & Edmunds, 1961) (syn.)
  • Ephemerella cascadia Allen & Edmunds, 1961 (syn.)
  • Ephemerella hystrix Traver, 1934 (orig.)
  • Ephemerella spinosa Mayo, 1951 (syn.)
• Caudatella jacobi (McDunnough, 1939) [CAN:NW;USA:FN,NW]
  • Ephemerella jacobi McDunnough, 1939 (orig.)
  • Ephemerella orestes Allen & Edmunds, 1961 (syn.)

• Caurinella idahoensis Allen, 1984 [USA:NW]

• Dannella lita (Burks, 1949) [CAN:NE,NW;USA:NE,SE]
  • Ephemerella lita Burks, 1949 (orig.)
  • Timpanoga lita (Burks, 1949) (comb.)
• Dannella provonshai (McCafferty, 1977) [USA:NE,SE]
  • Ephemerella provonshai McCafferty, 1977 (orig.)
  • Timpanoga provonshai (McCafferty, 1977) (comb.)
• Dannella simplex (McDunnough, 1925) [CAN:FN,NE,NW;USA:NE,SE]
  • Ephemerella simplex McDunnough, 1925 (orig.)
  • Timpanoga simplex (McDunnough, 1925) (comb.)

• Dentatella coxalis (McDunnough, 1926) [CAN:NE;USA:NE]
  • Dannella bartoni (Allen, 1977) (syn.)
  • Dentatella bartoni (Allen, 1977) (syn.)
  • Dentatella danutae McCafferty, 2000 (syn.)
  • Ephemerella bartoni Allen, 1977 (syn.)
  • Ephemerella coxalis McDunnough, 1926 (orig.)
  • Eurylophella bartoni (Allen, 1977) (syn.)
  • Eurylophella coxalis (McDunnough, 1926) (comb.)

• Drunella allegheniensis (Traver, 1934) [USA:SE]
  • Ephemerella allegheniensis Traver, 1934 (orig.)
• Drunella coloradensis (Dodds, 1923) [CAN:FN,NW;MEX:SW;USA:FN,NW,SW]
  • Ephemerella coloradensis Dodds, 1923 (orig.)
  • Ephemerella wilsoni Mayo, 1952 (syn.)
• Drunella cornuta (Morgan, 1911) [CAN:NE;USA:NE,SE]
  • Ephemerella cornuta Morgan, 1911 (orig.)
  • Ephemerella depressa Ide, 1930 (syn.)
• Drunella cornutella (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Ephemerella cornutella McDunnough, 1931 (orig.)
• Drunella doddsii (Needham, 1927) [CAN:FN,NW;USA:FN,NW,SW]
  • Drunella doddsi (Needham, 1927) (spell.)
  • Ephemerella doddsi Needham, 1927 (comb.,spell.)
  • Ephemerella doddsii Needham, 1927 (orig.)
• Drunella flavilinea (McDunnough, 1926) [CAN:FN,NW;MEX:SW;USA:NW,SW]
  • Ephemerella flavilinea McDunnough, 1926 (orig.)
  • Ephemerella lapidula McDunnough, 1935 (syn.)
• Drunella grandis flavitincta (McDunnough, 1934) [USA:NW]
  • Ephemerella flavitincta McDunnough, 1934 (orig.)
  • Ephemerella grandis flavitincta McDunnough, 1934 (stat.)
• Drunella grandis grandis (Eaton, 1884) [USA:FN,NW,SW]
  • Drunella grandis (Eaton, 1884) (comb.)
  • Ephemerella glacialis carsona Day, 1952 (syn.)
  • Ephemerella grandis Eaton, 1884 (orig.)
  • Ephemerella grandis grandis Eaton, 1884 (stat.)
  • Ephemerella sp. No. 1 Mayo, 1952 (syn.)
• Drunella grandis ingens (McDunnough, 1934) [CAN:FN,NW;USA:NW,SW]
  • Ephemerella glacialis Traver, 1934 (syn.)
  • Ephemerella glacialis glacialis Traver, 1934 (syn.)
  • Ephemerella grandis ingens McDunnough, 1934 (stat.)
  • Ephemerella ingens McDunnough, 1934 (orig.)
  • Ephemerella proserpina Traver, 1934 (syn.)
  • Ephemerella yosemite Traver, 1934 (syn.)
• Drunella lata (Morgan, 1911) [CAN:NE;USA:NE,SE]
  • Ephemerella inflata McDunnough, 1926 (syn.)
  • Ephemerella lata Morgan, 1911 (orig.)
• Drunella longicornis (Traver, 1932) [USA:SE]
• Ephemerella longicornis Traver, 1932 (orig.)
• Drunella pelosa (Mayo, 1951) [CAN:NW;USA:NW,SW]
  • Ephemerella pelosa Mayo, 1951 (orig.)
• Drunella spinifera (Needham, 1927) [CAN:FN,NW;USA:FN,NW,SW]
  • Drunella spinifer (Needham, 1927) (spell.)
  • Ephemerella autumnalis McDunnough, 1934 (syn.)
  • Ephemerella sierra Mayo, 1952 (syn.)
  • Ephemerella spinifera Needham, 1927 (orig.)
• Drunella tuberculata (Morgan, 1911) [CAN:NE;USA:NE,SE]
  • Drunella conestee (Traver, 1932) (syn.)
  • Ephemerella cherokee Traver, 1937 (syn.)
  • Ephemerella conestee Traver, 1932 (syn.)
  • Ephemerella tuberculata Morgan, 1911 (orig.)
• Drunella walkeri (Eaton, 1884) [CAN:NE;USA:NE,SE]
  • Baetis fuscata Walker, 1853 (hom.: B. fuscata Stephens, 1835)
  • Drunella wayah (Traver, 1932) (syn.)
  • Ephemerella bispina Needham, 1905 (syn.)
  • Ephemerella fuscata (Walker, 1853) (hom.comb.)
  • Ephemerella walkeri Eaton, 1884 (renam.)
  • Ephemerella wayah Traver, 1932 (syn.)

• Ephemerella alleni Jensen & Edmunds, 1966 [USA:NW]
• Ephemerella apopsis McCafferty, 1992 [USA:NW]
• Ephemerella aurivillii (Bengtsson, 1908) [CAN:FN,NE,NW;USA:FN,NE,NW,SW;ASIA;EURO]
  • Chitonophora aurivillii Bengtsson, 1908 (orig.)
  • Cincticostella ezoensis (Gose, 1980) (syn.)
  • Ephemerella aurivilliusi (Bengtsson, 1908) (spell.)
  • Ephemerella aroni Eaton, 1908 (syn.)
  • Ephemerella aronii Eaton, 1908 (syn.)
  • Ephemerella concinnata Traver, 1934 (syn.)
  • Ephemerella ezoensis Gose, 1980 (syn.)
  • Ephemerella maxima Allen, 1971 (syn.)
  • Ephemerella nN Imanishi, 1940 (syn.)
  • Ephemerella norda McDunnough, 1924 (syn.)
  • Ephemerella taeniata Tshernova, 1952 (syn.)
• Ephemerella catawba Traver, 1932 [USA:NE,SE]
• Ephemerella consimilis Walsh, 1862 (dub.) [USA:NE]
• Ephemerella dorothea dorothea Needham, 1908 [CAN:NE;USA:NE,SE]
  • Ephemerella dorothea Needham, 1908 (orig.)
• Ephemerella dorothea infrequens McDunnough, 1924 [CAN:FN,NW;USA:FN,NW,SW]
  • Ephemerella infrequens McDunnough, 1924 (orig.)
  • Ephemerella mollitia Seemann, 1927 (syn.)
• Ephemerella excrucians Walsh, 1862 [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Ephemerella argo Burks, 1949 (syn.)
  • Ephemerella crenula Allen & Edmunds, 1965 (syn.)
  • Ephemerella excurcians Walsh, 1862 (spell.)
  • Ephemerella inermis Eaton, 1884 (syn.)
  • Ephemerella lacustris Allen & Edmunds, 1965 (syn.)
  • Ephemerella ora Burks, 1949 (syn.)
  • Ephemerella rama Allen, 1968 (syn.)
  • Ephemerella rossi Allen & Edmunds, 1965 (syn.)
  • Ephemerella semiflava McDunnough, 1926 (syn.)
• Ephemerella floripara McCafferty, 1985 [USA:SE]
• Ephemerella hispida Allen & Edmunds, 1965 [USA:SE]
• Ephemerella invaria (Walker, 1853) [CAN:FN,NE,NW;USA:NE,SE]
  • Baetis invaria Walker, 1853 (orig.)
  • Chitonophora vernalis (Banks, 1914) (syn.)
  • Ephemerella choctawhatchee Berner, 1946 (syn.)
  • Ephemerella femenina Needham, 1924 (syn.spell.)
  • Ephemerella feminina Needham, 1924 (syn.)
  • Ephemerella fratercula McDunnough, 1925 (syn.)
  • Ephemerella inconstans Traver, 1932 (syn.)
  • Ephemerella rotunda Morgan, 1911 (syn.)
  • Ephemerella simila Allen & Edmunds, 1965 (syn.)
  • Ephemerella vernalis Banks, 1914 (syn.)
• Ephemerella maculata Traver, 1934 [CAN:FN;USA:NW,SW]
  • Ephemerella euterpe Traver, 1934 (syn.)
• Ephemerella molita McDunnough, 1930 (dub.) [CAN:NE]
• Serratella molita (McDunnough, 1930) (comb.)
• Ephemerella mucronata (Bengtsson, 1909) [CAN:FN,NW;USA:NW;ASIA;EURO]
  • Chitonophora krieghoffi Ulmer, 1920 (syn.)
  • Chitonophora mucronata Bengtsson, 1909 (orig.)
  • Chitonophora mucronata unicolorata Ikonomov, 1961 (syn.)
  • Chitonophora sp. nympha unicolorata Ikonomov, 1961 (syn.)
  • Ephemerella krieghoffi (Ulmer, 1920) (syn.)
  • Ephemerella krieghoffi intermedia Keffermuller, 1979 (syn.)
  • Ephemerella moffatae Allen, 1977 (syn.)
  • Ephemerella mucronata unicolorata (Ikonomov, 1961) (syn.)
  • Ephemerella mukronata Bengtsson, 1909 (spell.)
  • Ephemerella sp. nympha unicolorata (Ikonomov, 1961) (syn.)
  • Ephemerella unicolorata (Ikonomov, 1961) (syn.)
• Ephemerella needhami McDunnough, 1925 [CAN:NE,NW;USA:NE,SE]
• Ephemerella nuda Tshernova, 1949 [USA:FN;ASIA]
  • Ephemerella thymali Tshernova, 1952 (syn.)
  • Ephemerella verrucosa Kluge, 1980 (syn.)
• Ephemerella subvaria McDunnough, 1931 [CAN:NE;USA:NE,SE]
• Ephemerella tibialis McDunnough, 1924 [CAN:FN,NW;USA:FN,NW,SW]
  • Ephemerella angusta Traver, 1934 (syn.)
  • Ephemerella angustata Traver, 1934 (spell. syn.)
  • Ephemerella sequoia Allen & Collins, 1968 (syn.)
  • Serratella sequoia (Allen & Collins, 1968) (syn.)
  • Serratella tibialis (McDunnough, 1924) (comb.)
• Ephemerella unicornis Needham, 1905 (dub.) [USA:NE]
• Ephemerella velmae Allen & Edmunds, 1963 [USA:NW,SW]
  • Serratella velmae (Allen & Edmunds, 1963) (comb.)
• Ephemerella verruca Allen & Edmunds, 1965 [USA:NW]

• Eurylophella aestiva (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Ephemerella aestiva McDunnough, 1931 (orig.)
• Eurylophella bicolor (Clemens, 1913) [CAN:FN,NE,NW;USA:NE,SE]
  • Ephemerella bicolor Clemens, 1913 (orig.)
• Eurylophella bicoloroides (McDunnough, 1938) [CAN:NE;USA:NE]
  • Ephemerella bicoloroides McDunnough, 1938 (orig.)
• Eurylophella doris (Traver, 1934) [USA:SE]
  • Ephemerella doris Traver, 1934 (orig.)
  • Ephemerella trilineata Berner, 1946 (syn.)
• Eurylophella enoensis Funk, 1994 [CAN:NE;USA:NE,SE]
• Eurylophella funeralis (McDunnough, 1925) [CAN:NE;USA:NE,SE]
  • Ephemerella funeralis McDunnough, 1925 (orig.)
• Eurylophella lodi (Mayo, 1952) [CAN:NW;USA:NW]
  • Ephemerella lodi Mayo, 1952 (orig.)
• Eurylophella lutulenta (Clemens, 1913) [CAN:NE;USA:NE,SE]
  • Ephemerella lineata Clemens, 1913 (syn.)
  • Ephemerella lutulenta Clemens, 1913 (orig.)
• Eurylophella macdunnoughi Funk, 1994 [CAN:NE;USA:NE,SE]
• Eurylophella minimella (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Ephemerella minimella McDunnough, 1931 (orig.)
• Eurylophella oviruptis Funk, 2008 [USA:SE]
• Eurylophella poconoensis Funk, 1994 [USA:NE]
• Eurylophella prudentalis (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Ephemerella prudentalis McDunnough, 1931 (orig.)
• Eurylophella temporalis (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,SE]
  • Ephemerella temporalis McDunnough, 1924 (orig.)
• Eurylophella verisimilis (McDunnough, 1930) [CAN:NE;USA:NE,SE]
  • Ephemerella verisimilis McDunnough, 1930 (orig.)
  • Eurylophella versimilis (McDunnough, 1930) (spell.comb.)

• Matriella teresa (Traver, 1934) [CAN:NW;USA:NW,SW]
  • Ephemerella cognata Traver, 1934 (syn.)
  • Ephemerella teresa Traver, 1934 (orig.)
  • Serratella teresa (Traver, 1934) (comb.)

• Penelomax septentrionalis (McDunnough, 1925) [CAN:NE;USA:NE,SE]
  • Ephemerella septentrionalis McDunnough, 1925 (orig.)

• Serratella frisoni (McDunnough, 1927) [USA:NE,SE]
  • Ephemerella frisoni McDunnough, 1927 (orig.)
• Serratella levis (Day, 1954) [USA:NW,SW]
  • Ephemerella levis Day, 1954 (orig.)
  • Ephemerella sp. No. 2 Mayo, 1952 (syn.)
• Serratella micheneri (Traver, 1934) [MEX:SW;USA:NW,SW]
  • Ephemerella altana Allen, 1968 (syn.)
  • Ephemerella micheneri Traver, 1934 (orig.)
• Serratella serrata (Morgan, 1911) [CAN:NE,NW;USA:NE,SE]
  • Ephemerella carolina Berner & Allen, 1961 (syn.)
  • Ephemerella serrata Morgan, 1911 (orig.)
  • Ephemerella sordida McDunnough, 1925 (syn.)
  • Ephemerella spiculosa Berner & Allen, 1961 (syn.)
  • Serratella carolina (Berner & Allen, 1961) (syn.)
  • Serratella sordida (McDunnough, 1925) (syn.)
  • Serratella spiculosa (Berner & Allen, 1961) (syn.)
• Serratella serratoides (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Ephemerella serratoides McDunnough, 1931 (orig.)

• Teloganopsis deficiens (Morgan, 1911) [CAN:NE;USA:NE,SE]
  • Ephemerella atrescens McDunnough, 1925 (syn.)
  • Ephemerella deficiens Morgan, 1911 (orig.)
  • Serratella deficiens (Morgan, 1911) (comb.)

• Timpanoga hecuba hecuba (Eaton, 1884) [CAN:NW;USA:NW,SW]
  • Ephemerella hecuba Eaton, 1884 (orig.)
  • Ephemerella hecuba hecuba Eaton, 1884 (stat.)
• Timpanoga hecuba pacifica (Allen & Edmunds, 1959) [USA:NW]
  • Ephemerella hecuba pacifica Allen & Edmunds, 1959 (orig.)

• Tsalia berneri (Allen & Edmunds, 1958) [USA:SE]
  • Ephemerella berneri Allen & Edmunds, 1958 (orig.)

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EPHEMERIDAE

• Ephemera blanda Traver, 1932 [CAN:NE;USA:SE]
  • Ephemera triplex Traver, 1935 (syn.)
• Ephemera compar Hagen, 1875 [USA:NW] (recently extinct)
• Ephemera guttulata Pictet, 1843 [CAN:NE;USA:NE,SE]
• Ephemera simulans Walker, 1853 [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Ephemera decora Walker, 1853 (syn.)
  • Ephemera natata (Walker, 1853) (syn.)
  • Palingenia natata Walker, 1853 (syn.)
• Ephemera traverae Spieth, 1938 [USA:SE]
  • Ephemera traveri Spieth, 1938 (spell.)
• Ephemera varia Eaton, 1883 [CAN:NE;USA:NE,SE]

• Hexagenia albivitta (Walker, 1853) [MEX:FS;CAMR;SAMR]
  • Baetis albivitta Walker, 1853 (orig.)
  • Hexagenia albivittata (Walker, 1853) (spell.)
  • Hexagenia benedicta Navas, 1922 (syn.)
  • Hexagenia dominans Navas, 1936 (syn.)
  • Palingenia continua Eaton, 1860 (syn.)
  • Palingenia dorsigera Hagen, 1861 (syn.nud.)
• Hexagenia atrocaudata McDunnough, 1924 [CAN:NE;USA:NE,SE]
• Hexagenia bilineata (Say, 1824) [CAN:NE;MEX:FS,SW;USA:NE,SE,SW]
  • Baetis bilineata Say, 1824 (orig.)
  • Palingenia bilineata (Say, 1824) (comb.)
• Hexagenia limbata (Serville, 1829) [CAN:FN,NE,NW;MEX:FS,SW;USA:NE,NW,SE,SW]
  • Baetis angulata Walker, 1853 (syn.)
  • Ephemera limbata Serville, 1829 (orig.)
  • Hexagenia affiliata McDunnough, 1927 (syn.)
  • Hexagenia angulata (Walker, 1853) (syn.)
  • Hexagenia californica Upholt, 1937 (syn.)
  • Hexagenia carolina Traver, 1931 (syn.)
  • Hexagenia elegans Traver, 1931 (syn.)
  • Hexagenia kanuga Traver, 1937 (syn.)
  • Hexagenia marilandica Traver, 1931 (syn.)
  • Hexagenia mingo Traver, 1931 (syn.)
  • Hexagenia munda Eaton, 1883 (syn.)
  • Hexagenia occulta (Walker, 1853) (syn.)
  • Hexagenia pallens Traver, 1935 (syn.)
  • Hexagenia rosacea Traver, 1931 (syn.)
  • Hexagenia variabilis Eaton, 1883 (syn.)
  • Hexagenia venusta Eaton, 1883 (syn.)
  • Hexagenia viridescens (Walker, 1853) (syn.)
  • Hexagenia weewa Traver, 1931 (syn.)
  • Palingenia limbata (Serville, 1829) (comb.)
  • Palingenia occulta Walker, 1853 (syn.)
  • Palingenia viridescens Walker, 1853 (syn.)
• Hexagenia mexicana Eaton, 1883 [MEX:FS;CAMR;SAMR]
• Hexagenia orlando Traver, 1931 [USA:SE]
• Hexagenia rigida McDunnough, 1924 [CAN:NE;USA:NE,SE]
  • Hexagenia form falcata Needham, 1920 (syn.nud.)

• Litobrancha recurvata (Morgan, 1913) [CAN:NE;USA:NE,SE]
  • Hexagenia recurrata Morgan, 1913 (spell.)
  • Hexagenia recurvata Morgan, 1913 (orig.)

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EUTHYPLOCIIDAE

• Euthyplocia hecuba (Hagen, 1861) [MEX:FS,SW;CAMR;SAMR]
  • Palingenia hecuba Hagen, 1861 (orig.)

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HEPTAGENIIDAE

• Anepeorus rusticus McDunnough, 1925 [CAN:FN,NW;USA:NW]
  • Acanthomola pubescens Whiting & Lehmkuhl, 1987 (syn.)

• Cinygma dimicki McDunnough, 1934 [USA:NW]
• Cinygma integrum Eaton, 1885 [CAN:NW;USA:NW,SW]
• Cinygma lyriforme (McDunnough, 1924) [CAN:NW;USA:FN,NW,SW;ASIA;EURO]
  • Cinygma lyriformis (McDunnough, 1924) (spell.)
  • Cinygma petersoni (Lestage, 1930) (syn.)
  • Ecdyonurus lyriformis McDunnough, 1924 (orig.)
  • Ecdyonurus peterseni Lestage, 1930 (syn.)
  • Ecdyonurus hyalinus Esben-Petersen, 1916 (hom.: E. hyalinus Ulmer, 1912)
  • Heptagenia abnorme Tshernova, 1949 (syn.)
  • Heptagenia abnormis Tshernova, 1949 (syn.)

• Cinygmula gartrelli McDunnough, 1934 [CAN:NW;USA:NW]
  • Rhithrogena gartrelli (McDunnough, 1934) (comb.)
• Cinygmula kootenai McDunnough, 1943 [CAN:NW;USA:NW]
  • Rhithrogena kootenai (McDunnough, 1943) (comb.)
• Cinygmula mimus (Eaton, 1885) [CAN:FN,NW;USA:FN,NW,SW]
  • Cinygma mimus Eaton, 1885 (orig.)
  • Rhithrogena mimus (Eaton, 1885) (comb.)
• Cinygmula par (Eaton, 1885) [CAN:FN,NW;USA:FN,NW,SW]
  • Cinygma confusa McDunnough, 1924 (syn.)
  • Cinygma par Eaton, 1885 (orig.)
  • Cinygma hyalina McDunnough, 1924 (syn.)
  • Cinygmula confusa (McDunnough, 1924) (syn.)
  • Cinygmula hyalina (McDunnough, 1924) (syn.)
  • Cynigma mimus Eaton, 1885 (spell.)
  • Rhithrogena confusa (McDunnough, 1924) (syn.)
  • Rhithrogena par (Eaton, 1885) (comb.)
• Cinygmula ramaleyi (Dodds, 1923) [CAN:FN,NW;USA:NW,SW]
  • Cinygma ramaleyi (Dodds, 1923) (comb.)
  • Ecdyonurus ramaleyi Dodds, 1923 (orig.)
  • Iron tollandi Dodds, 1923 (syn.)
  • Rhithrogena ramaleyi (Dodds, 1923) (comb.)
• Cinygmula reticulata McDunnough, 1934 [CAN:NW;USA:NW,SW]
  • Rhithrogena reticulata (McDunnough, 1934) (comb.)
• Cinygmula subaequalis (Banks, 1914) [CAN:FN,NE;USA:FN,NE,SE]
  • Cinygma atlantica McDunnough, 1924 (syn.)
  • Cinygmula atlantica (McDunnough, 1924) (syn.)
  • Heptagenia subaequalis Banks, 1914 (orig.)
  • Rhithrogena subaequalis (Banks, 1914) (comb.)
  • Stenonema subaequalis (Banks, 1914) (comb.)
• Cinygmula tarda (McDunnough, 1929) [CAN:FN,NW;USA:FN,NW]
  • Cinygma tarda McDunnough, 1929 (orig.)
  • Rhithrogena tarda (McDunnough, 1929) (comb.)
• Cinygmula tioga Mayo, 1952 [USA:NW]
  • Rhithrogena tioga (Mayo, 1952) (comb.)
• Cinygmula uniformis McDunnough, 1934 [CAN:FN,NW;USA:NW,SW]
  • Rhithrogena uniformis (McDunnough, 1934) (comb.)

• Ecdyonurus bellus (Allen & Cohen, 1977) [MEX:FS;CAMR]
  • Nixe bella (Allen & Cohen, 1977) (comb.)
  • Heptagenia bella Allen & Cohen, 1977 (orig.)
• Ecdyonurus criddlei (McDunnough, 1927) [CAN:NW;MEX:SW;USA:HI,NW,SW]
  • Ecdyonurus otiosus (McDunnough, 1935) (syn.)
  • Ecdyonurus rosea (Traver, 1935) (syn.)
  • Ecdyonurus salvini (Kimmins, 1934) (syn.)
  • Heptagenia criddlei McDunnough, 1927 (orig.)
  • Heptagenia otiosa McDunnough, 1935 (syn.)
  • Heptagenia rosea Traver, 1935 (syn.)
  • Heptagenia rubroventris Traver, 1935 (syn.)
  • Heptagenia salvini Kimmins, 1934 (syn.)
  • Nixe criddlei (McDunnough, 1927) (comb.)
  • Nixe otiosa (McDunnough, 1935) (syn.)
  • Nixe rosea (Traver, 1935) (syn.)
  • Nixe salvini (Kimmins, 1934) (syn.)
• Ecdyonurus simplicioides (McDunnough, 1924) [CAN:NE,NW;USA:FN,NW,SW;ASIA]
  • Ecdyonurus rodocki (Traver, 1935) (syn.)
  • Ecdyonurus werestschagini (Tshernova, 1952) (syn.)
  • Heptagenia rodocki Traver, 1935 (syn.)
  • Heptagenia simpliciodes McDunnough, 1924 (spell.)
  • Heptagenia simplicioides McDunnough, 1924 (orig.)
  • Heptagenia werestschagini Tshernova, 1952 (syn.)
  • Nixe rodocki (Traver, 1935) (syn.)
  • Nixe simpliciodes (McDunnough, 1935) (syn.)
  • Paracinygmula simpliciodides (McDunnough, 1924) (comb.)
  • Rhithrogena imanica Bajkova, 1972 (syn.)

• Epeorus albertae (McDunnough, 1924) [CAN:FN,NE,NW;USA:FN,NW,SW]
  • Iron albertae McDunnough, 1924 (orig.)
  • Iron youngi Traver, 1935 (syn.)
• Epeorus deceptivus (McDunnough, 1924) [CAN:FN,NW;USA:FN,NW,SW]
  • Cinygma deceptiva McDunnough, 1924 (orig.)
  • Iron deceptivus (McDunnough, 1924) (comb.)
• Epeorus dispar (Traver, 1933) [USA:SE]
  • Iron dispar Traver, 1933 (orig.)
• Epeorus dulciana (McDunnough, 1935) [CAN:NW;USA:NW,SW]
  • Iron dulciana McDunnough, 1935 (orig.)
• Epeorus fragilis (Morgan, 1911) [CAN:NE;USA:NE,SE]
  • Iron fragilis Morgan, 1911 (orig.)
  • Iron tenuis Traver, 1935 (syn.)
• Epeorus frisoni (Burks, 1946) [USA:NE]
  • Iron frisoni Burks, 1946 (orig.)
• Epeorus grandis (McDunnough, 1924) [CAN:FN,NW;USA:FN,NW,SW]
  • Ironopsis grandis (McDunnough, 1924) (comb.)
  • Iron grandis McDunnough, 1924 (orig.)
• Epeorus hesperus (Banks, 1924) [USA:NW,SW]
  • Iron hesperus (Banks, 1924) (comb.)
  • Iron sancta-gabriel Traver, 1935 (syn.)
  • Rhithrogena hespera Banks, 1924 (orig.)
• Epeorus lagunitas (Traver, 1935) [USA:HI,NW]
  • Iron lagunitas Traver, 1935 (orig.)
• Epeorus longimanus (Eaton, 1885) [CAN:FN,NW;USA:FN,NW,SW]
  • Iron longimanus Eaton, 1885 (orig.)
  • Iron proprius Traver, 1935 (syn.)
• Epeorus margarita Edmunds & Allen, 1964 [MEX:SW;USA:NW,SW]
  • Iron margarita (Edmunds & 1964) (comb.)
• Epeorus metlacensis Traver, 1964 [MEX:FS,SW;CAMR]
  • Iron metlacensis (Traver, 1964) (comb.)
• Epeorus namatus (Burks, 1946) [USA:NE,SE]
  • Iron namatus Burks, 1946 (orig.)
• Epeorus permagnus (Traver, 1935) [CAN:NW;USA:NW]
  • Ironopsis permagnus Traver, 1935 (orig.)
• Epeorus pleuralis (Banks, 1910) [CAN:NE;USA:NE,SE]
  • Heptagenia pleuralis Banks, 1910 (orig.)
  • Iron confusus Traver, 1935 (syn.)
  • Iron fraudator Traver, 1935 (syn.)
  • Iron pleuralis (Banks, 1910) (comb.)
• Epeorus punctatus (McDunnough, 1925) [CAN:NE;USA:NE,SE]
  • Iron punctatus McDunnough, 1925 (orig.)
• Epeorus subpallidus (Traver, 1937) [USA:SE]
  • Iron subpallidus Traver, 1937 (orig.)
• Epeorus suffusus (McDunnough, 1925) [CAN:NE;USA:NE]
  • Iron suffusus McDunnough, 1925 (orig.)
• Epeorus vitreus (Walker, 1853) [CAN:NE;USA:NE,SE]
  • Epeorus humeralis Morgan, 1911 (syn.)
  • Epeorus rubidus (Traver, 1933) (syn.)
  • Heptagenia vitrea (Walker, 1853) (comb.)
  • Iron humeralis (Morgan, 1911) (syn.)
  • Iron vitreus (Walker, 1853) (comb.)
  • Iron rubidus Traver, 1933 (syn.)
  • Palingenia vitrea Walker, 1853 (orig.)
  • Rhithrogena vitrea (Walker, 1853) (comb.)

• Heptagenia adaequata McDunnough, 1924 [CAN:NW;USA:NW,SW]
  • Heptagenia adequata McDunnough, 1924 (spell.)
• Heptagenia culacantha Evans, Botts & Flowers, 1985 [USA:NE]
• Heptagenia dalecarlica Bengtsson, 1912 [CAN:NE;ASIA;EURO]
• Heptagenia soldatovi Tshernova, 1952 (syn.)
• Heptagenia dolosa Traver, 1935 [USA:SE]
• Heptagenia elegantula (Eaton, 1885) [CAN:FN,NE,NW;MEX:SW;USA:NE,NW,SE,SW]
  • Heptagenia coxalis Banks, 1914 (syn.)
  • Heptagenia diabasia Burks, 1946 (syn.)
  • Heptagenia querula McDunnough, 1924 (syn.)
  • Rhithrogena elegantula Eaton, 1885 (orig.)
• Heptagenia flavescens (Walsh, 1862) [CAN:FN,NE,NW;MEX:SW;USA:NE,NW,SE,SW]
  • Palingenia flavescens Walsh, 1862 (orig.)
• Heptagenia julia Traver, 1933 [USA:NE,SE]
• Heptagenia marginalis Banks, 1910 [CAN:NE;USA:NE,SE]
• Heptagenia pulla (Clemens, 1913) [CAN:FN,NE,NW;USA:FN,NE,SE]
  • Ecdyonurus pullus (Clemens, 1913) (comb.)
  • Ecdyurus grandis Clemens, 1913 (nom. nud.)
  • Ecdyurus pullus Clemens, 1913 (orig.)
  • Heptagenia pullus Clemens, 1913 (spell.)
• Heptagenia solitaria McDunnough, 1924 [CAN:FN,NW;USA:NW,SW]
• Heptagenia townesi Traver, 1935 [USA:SE]
• Heptagenia whitingi Webb & McCafferty, 2007 [CAN:NW;USA:NE,NW]

• Ironodes arctus Traver, 1935 [CAN:NW;USA:NW]
  • Epeorus arctus (Traver, 1935) (comb.)
• Ironodes californicus (Banks, 1910) [USA:NW,SW]
  • Epeorus californicus (Banks, 1910) (comb.)
  • Heptagenia californicus Banks, 1910 (orig.)
  • Iron californicus Banks, 1910 (comb.)
• Ironodes flavipennis Traver, 1935 [CAN:NW]
  • Epeorus flavipennis (Traver, 1935) (comb.)
• Ironodes geminatus (Eaton, 1885) (dub.) [USA:NW]
  • Cinygma geminatum Eaton, 1885 (orig.)
  • Epeorus geminatus (Eaton, 1885) (comb.)
• Ironodes lepidus Traver, 1935 [USA:NW,SW]
  • Epeorus lepidus (Traver, 1935) (comb.)
• Ironodes nitidus (Eaton, 1885) [CAN:NW;MEX:SW;USA:FN,NW,SW]
  • Epeorus nitidus (Eaton, 1885) (comb.)
  • Iron nitidus Eaton, 1885 (orig.)

• Leucrocuta aphrodite (McDunnough, 1926) [CAN:NE;USA:NE,SE,SW]
  • Ecdyonurus aphrodite (McDunnough, 1926) (comb.)
  • Heptagenia aphrodite McDunnough, 1926 (orig.)
• Leucrocuta hebe (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,NW,SE]
  • Ecdyonurus hebe (McDunnough, 1924) (comb.)
  • Heptagenia hebe McDunnough, 1924 (orig.)
• Leucrocuta jewetti (Allen, 1966) [CAN:NE;USA:NW]
  • Ecdyonurus jewetti (Allen, 1966) (comb.)
  • Heptagenia jewetti Allen, 1966 (orig.)
• Leucrocuta juno (McDunnough, 1924) [CAN:NE;USA:NE,SE]
  • Ecdyonurus juno (McDunnough, 1924) (comb.)
  • Heptagenia juno McDunnough, 1924 (orig.)
• Leucrocuta maculipennis (Walsh, 1863) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Ecdyonurus maculipennis (Walsh, 1863) (comb.)
  • Ecdyurus maculipennis (Walsh, 1863) (comb.)
  • Heptagenia maculipennis Walsh, 1863 (orig.)
• Leucrocuta minerva (McDunnough, 1924) [CAN:NE;USA:NE,SE]
  • Ecdyonurus minerva (McDunnough, 1924) (comb.)
  • Heptagenia minerva McDunnough, 1924 (orig.)
• Leucrocuta petersi (Allen, 1966) [USA:NW,SW]
  • Ecdyonurus petersi (Allen, 1966) (comb.)
  • Heptagenia petersi Allen, 1966 (orig.)
• Leucrocuta thetis (Traver, 1935) [USA:NE,SE]
  • Ecdyonurus thetis (Traver, 1935) (comb.)
  • Heptagenia thetis Traver, 1935 (orig.)
• Leucrocuta umbratica (McDunnough, 1931) [CAN:NE;USA:NE,SE]
  • Ecdyonurus umbraticus (McDunnough, 1931) (comb.)
  • Heptagenia umbratica McDunnough, 1931 (orig.)
  • Heptagenia umbricata McDunnough, 1931 (spell.)
• Leucrocuta walshi (McDunnough, 1926) [CAN:NE;USA:NE]
  • Ecdyonurus walshi (McDunnough, 1926) (comb.)
  • Heptagenia walshi McDunnough, 1926 (orig.)

• Maccaffertium appaloosa McCafferty, 2011 [USA:SE]
• Maccaffertium bednariki (McCafferty, 1981) [USA:SE]
  • Heptagenia bednariki (McCafferty, 1981) (comb.)
  • Stenonema bednariki McCafferty, 1981 (orig.)
• Maccaffertium carlsoni (Lewis, 1974) [USA:SE]
  • Heptagenia carlsoni (Lewis, 1974) (comb.)
  • Stenonema carlsoni Lewis, 1974 (orig.)
• Maccaffertium exiguum (Traver, 1933) [CAN:NE;USA:NE,SE]
  • Heptagenia exigua (Traver, 1933) (comb.)
  • Stenonema alabamae Traver, 1937 (syn.)
  • Stenonema exiguum Traver, 1933 (orig.)
  • Stenonema quinquespinum Lewis, 1974 (syn.)
• Maccaffertium flaveolum (Pictet, 1843) (dub.) [CAN:NE]
  • Baetis flaveola Pictet, 1843 (orig.)
  • Heptagenia flaveola (Pictet, 1843) (comb.)
  • Stenonema flaveolum (Pictet, 1843) (comb.)
• Maccaffertium ithaca (Clemens & Leonard, 1924) [CAN:NE;USA:NE,SE]
  • Ecdyonurus ithaca (Clemens & Leonard, 1924) (comb.)
  • Heptagenia ithaca Clemens & Leonard, 1924 (orig.)
  • Stenonema allegheniense Carle, 1977 (syn.)
  • Stenonema ithaca (Clemens & Leonard, 1924) (comb.)
• Maccaffertium lenati (McCafferty, 1990) [USA:SE]
  • Stenonema lenati McCafferty, 1990 (orig.)
• Maccaffertium luteum (Clemens, 1913) [CAN:FN,NE;USA:NE,SE]
  • Ecdyonurus luteus (Clemens, 1913) (comb.)
  • Heptagenia lutea Clemens, 1913 (orig.)
  • Stenonema luteum (Clemens, 1913) (comb.)
• Maccaffertium mediopunctatum arwini (Bednarik & McCafferty, 1979) [CAN:NE;USA:NE,SE,SW]
  • Heptagenia mediopunctata arwini (Bednarik & McCafferty, 1979) (comb.)
  • Stenonema mediopunctata arwini Bednarik & McCafferty, 1979 (orig.)
• Maccaffertium mediopunctatum mediopunctatum (McDunnough, 1926) [CAN:NE;USA:NE,SE]
  • Ecdyonurus mediopunctatus McDunnough, 1926 (orig.)
  • Ecdyonurus nepotellus McDunnough, 1933 (syn.)
  • Heptagenia mediopunctata (McDunnough, 1926) (comb.)
  • Heptagenia mediopunctata mediopunctata (McDunnough, 1926) (comb.)
  • Stenonema mediopunctatum (McDunnough, 1926) (comb.)
  • Stenonema mediopunctatum mediopunctatum (McDunnough, 1926) (comb.)
  • Stenonema nepotellum (McDunnough, 1933) (syn.)
• Maccaffertium meririvulanum (Carle & Lewis, 1978) [CAN:NE;USA:NE,SE]
  • Heptagenia meririvulana (Carle & Lewis, 1978) (comb.)
  • Stenonema meririvulanum Carle & Lewis, 1978 (orig.)
  • Stenonema sp. No. 3 Traver, 1933 (syn.)
• Maccaffertium mexicanum integrum (McDunnough, 1924) [CAN:NE;MEX:SW;USA:NE,SE,SW]
  • Heptagenia integer McDunnough, 1924 (orig.)
  • Heptagenia mexicana integer McDunnough, 1924 (comb.)
  • Stenonema bellum Traver, 1933 (syn.)
  • Stenonema integrum (McDunnough, 1924) (comb.)
  • Stenonema metriotes Burks, 1953 (syn.)
  • Stenonema mexicanum integrum (McDunnough, 1924) (comb.)
  • Stenonema wabasha Daggy, 1945 (syn.)
• Maccaffertium mexicanum mexicanum (Ulmer, 1920) [MEX:FS;CAMR]
  • Heptagenia mexicana Ulmer, 1920 (orig.)
  • Heptagenia mexicana mexicana Ulmer, 1920 (stat.)
  • Stenonema mexicana (Ulmer, 1920) (comb.spell.)
  • Stenonema mexicanum mexicanum (Ulmer, 1920) (comb.)
• Maccaffertium modestum (Banks, 1910) [CAN:NE;USA:NE,SE]
  • Ecdyonurus ruber McDunnough, 1926 (syn.)
  • Ecdyonurus rubromaculatus (Clemens, 1913) (syn.)
  • Epeorus modestus Banks, 1910 (orig.)
  • Heptagenia modesta (Banks, 1910) (comb.)
  • Heptagenia rubromaculata Clemens, 1913 (syn.)
  • Iron modestus (Banks, 1910) (comb.)
  • Stenonema annexum Traver, 1933 (syn.)
  • Stenonema modestum (Banks, 1910) (comb.)
  • Stenonema ruber (McDunnough, 1926) (syn.)
  • Stenonema rubromaculatum (Clemens, 1913) (syn.)
  • Stenonema rubrum (McDunnough, 1926) (syn.)
  • Stenonema varium Traver, 1933 (syn.)
• Maccaffertium pudicum (Hagen, 1861) [USA:NE,SE]
  • Ecdyonurus pudicus (Hagen, 1861) (comb.)
  • Ephemera pudica Hagen, 1861 (orig.)
  • Heptagenia pudica (Hagen, 1861) (comb.)
  • Stenonema pudicum (Hagen, 1861) (comb.)
• Maccaffertium pulchellum (Walsh, 1862) [CAN:NE;USA:NE,SE]
  • Ecdyonurus pulchellus (Walsh, 1862) (comb.)
  • Heptagenia luridipennis (Burmeister, 1839) (id.)
  • Heptagenia pulchella (Walsh, 1862) (comb.)
  • Palingenia pulchella Walsh, 1862 (orig.)
  • Stenonema pulchellum (Walsh, 1862) (comb.)
• Maccaffertium sinclairi (Lewis, 1979) [USA:SE]
  • Heptagenia sinclairi (Lewis, 1979) (comb.)
  • Stenonema sinclairi Lewis, 1979 (orig.)
• Maccaffertium smithae (Traver, 1937) [CAN:NE;USA:NE,SE]
  • Heptagenia smithae (Traver, 1937) (comb.)
  • Stenonema smithae Traver, 1937 (orig.)
• Maccaffertium terminatum placitum (Banks, 1910) [CAN:NE;USA:NE]
  • Ecdyonurus placita (Banks, 1910) (comb.)
  • Heptagenia placita Banks, 1910 (orig.)
  • Heptagenia terminata placita Banks, 1910 (comb.)
  • Stenonema placitum (Banks, 1910) (comb.)
  • Stenonema terminatum placitum (Banks, 1910) (comb.)
• Maccaffertium terminatum terminatum (Walsh, 1862) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
  • Ecdyonurus bipunctatus McDunnough, 1926 (syn.)
  • Ecdyonurus terminatus (Walsh, 1862) (comb.)
  • Heptagenia terminata (Walsh, 1862) (comb.)
  • Heptagenia terminata terminata (Walsh, 1862) (comb.)
  • Palingenia terminata Walsh, 1862 (orig.)
  • Stenonema ares Burks, 1953 (syn.)
  • Stenonema bipunctatum (McDunnough, 1926) (syn.)
  • Stenonema lepton Burks, 1946 (syn.)
  • Stenonema terminatum (Walsh, 1862) (comb.)
  • Stenonema terminatum terminatum (Walsh, 1862) (comb.)
• Maccaffertium vicarium (Walker, 1853) [CAN:FN,NE,NW;USA:NE,SE]
  • Baetis tessellata Walker, 1853 (syn.)
  • Baetis vicaria Walker, 1853 (orig.)
  • Ecdyonurus fusca (Clemens, 1913) (syn.spell)
  • Ecdyonurus fuscum (Clemens, 1913) (syn.)
  • Ecdyonurus fuscus (Clemens, 1913) (syn.spell)
  • Ecdyonurus rivulicolus McDunnough, 1933 (syn.)
  • Ecdyonurus vicarius (Walker, 1853) (comb.)
  • Ecdyurus vicarius (Walker, 1853) (comb.)
  • Heptagenia fusca Clemens, 1913 (syn.)
  • Heptagenia vicaria (Walker, 1853) (comb.)
  • Stenonema fuscum (Clemens, 1913) (syn.)
  • Stenonema rivulicolum (McDunnough, 1933) (syn.)
  • Stenonema tessellata (Walker, 1853) (syn.spell)
  • Stenonema tessellatum (Walker, 1853) (syn.)
  • Stenonema vicarium (Walker, 1853) (comb.)
• Maccaffertium wudigeum McCafferty & Lenat, 2010 [USA:SE]

• Macdunnoa brunnea Flowers, 1982 [USA:NE,SE]
  • Heptagenia brunnea (Flowers, 1982) (comb.)
• Macdunnoa nipawinia Lehmkuhl, 1979 [CAN:NW;USA:NW]
  • Heptagenia nipawinia (Lehmkuhl, 1979) (comb.)
  • Macdunnoa hipawinia Lehmkuhl, 1979 (spell.)
• Macdunnoa persimplex (McDunnough, 1929) [CAN:NE;USA:NE,NW,SE]
  • Heptagenia persimplex McDunnough, 1929 (orig.)

• Nixe dorothae Webb & McCafferty, 2011 [USA:NE]
• Nixe flowersi McCafferty, 1982 [USA:NE,SE]
  • Ecdyonurus flowersi (McCafferty, 1982) (comb.)
• Nixe horrida (McDunnough, 1926) [CAN:NE;USA:NE]
  • Ecdyonurus horridus (McDunnough, 1926) (comb.)
  • Heptagenia horrida McDunnough, 1926 (orig.)
• Nixe inconspicua (McDunnough, 1924) [CAN:NE,NW;USA:NE,SE]
  • Ecdyonurus inconspicuus (McDunnough, 1924) (comb.)
  • Heptagenia inconspicua McDunnough, 1924 (orig.)
• Nixe joernensis (Bengtsson, 1909) [CAN:NE;ASIA;EURO]
  • Afghanurus dentatus (Braasch, 1979) (misid.)
  • Afghanurus flavomaculatus (Aro, 1928) (syn.)
  • Afghanurus joernensis (Aro, 1928) (comb.)
  • Afghanurus mongolicus (Bajkova & Varykhanova, 1978) (syn.)
  • Afghanurus stubbei (Braasch, 1979) (syn.)
  • Ecdyonurus flavomaculatus Aro, 1928 (syn.)
  • Ecdyonurus dentatus (Braasch, 1979) (misid.)
  • Ecdyonurus joernensis (Bengtsson, 1909) (comb.)
  • Ecdyonurus joernensis mongolicus (Bajkova & Varykhanova, 1978) (syn.)
  • Ecdyonurus KUb Yoon & Bae, 1984 (syn.)
  • Ecdyonurus mongolicus (Bajkova & Varykhanova, 1978) (syn.)
  • Ecdyonurus stubbei Braasch, 1979 (syn.)
  • Ecdyurus joernensis Bengtsson, 1909 (orig.)
  • Heptagenia dentata Braasch, 1979 (misid.)
  • Heptagenia joernensis (Bengtsson, 1909) (comb.)
  • Heptagenia mongolica Bajkova & Varykhanova, 1978 (syn.)
  • Nixe dentata (Braasch, 1979) (misid.)
  • Nixe mongolica (Bajkova & Varykhanova, 1978) (syn.)
  • Paracinygmula joernensis (Bengtsson, 1909) (comb.)
• Nixe kennedyi (McDunnough, 1924) [USA:NW]
  • Ecdyonurus kennedyi (McDunnough, 1924) (comb.)
  • Heptagenia kennedyi McDunnough, 1924 (orig.)
• Nixe lucidipennis (Clemens, 1913) [CAN:FN,NE,NW:USA:NE,SE]
  • Ecdyonurus lucidipennis (Clemens, 1913) (comb.)
  • Ecdyurus lucidipennis Clemens, 1913 (orig.)
  • Heptagenia lucidipennis (Clemens, 1913) (comb.)
• Nixe perfida (McDunnough, 1926) [CAN:NE;USA:NE,SE]
  • Ecdyonurus perfidus (McDunnough, 1926) (comb.)
  • Heptagenia perfida McDunnough, 1926 (orig.)
• Nixe rusticalis (McDunnough, 1931) [CAN:FN,NE,NW;USA:NE,SE]
  • Ecdyonurus rusticalis (McDunnough, 1931) (comb.)
  • Heptagenia rusticalis McDunnough, 1931 (orig.)
• Nixe spinosa (Traver, 1933) [USA:SE]
  • Heptagenia spinosa Traver, 1933 (orig.)

• Raptoheptagenia cruentata (Walsh, 1863) [CAN:NE,NW;USA:NE,NW,SE]
  • Heptagenia cruentata Walsh, 1863 (orig.)
  • Heptagenia reversalis McDunnough, 1924 (syn.)
  • Heptagenia patoka Burks, 1946 (syn.)

• Rhithrogena amica Traver, 1935 [CAN:NE;USA:NE,SE]
• Rhithrogena anomala McDunnough, 1928 [CAN:NE;USA:NE,SE]
• Rhithrogena brunneotincta McDunnough, 1933 [CAN:NE;USA:NE]
• Rhithrogena decora Day, 1954 [USA:NW,SW]
• Rhithrogena exilis Traver, 1933 [USA:SE]
• Rhithrogena fasciata Traver, 1933 [USA:SE]
• Rhithrogena flavianula (McDunnough, 1924) [USA:NW,SW]
  • Heptagenia flavianula McDunnough, 1924 (orig.)
• Rhithrogena fuscifrons Traver, 1933 [USA:SE]
• Rhithrogena futilis McDunnough, 1934 [CAN:FN,NW;USA:FN,NW,SW]
• Rhithrogena gaspeensis McDunnough, 1933 [CAN:NE]
• Rhithrogena hageni Eaton, 1885 [CAN:NW;USA:NW,SW]
  • Heptagenia brunnea Hagen, 1875 (hom.: H. brunnea (Rambur, 1842))
  • Rhithrogena brunnea (Hagen, 1875) (hom.comb.)
  • Rhithrogena doddsi McDunnough, 1926 (syn.)
• Rhithrogena impersonata (McDunnough, 1925) [CAN:NE;USA:NE,SE]
  • Heptagenia impersonata McDunnough, 1925 (orig.)
  • Rhithrogena sanguinea Ide, 1954 (syn.)
• Rhithrogena ingalik Randolph & McCafferty, 2005 [USA:FN]
• Rhithrogena jejuna Eaton, 1885 [CAN:FN,NE,NW;USA:NE,NW,SW]
  • Baetis fusca Walker, 1853 (hom.: B. fusca Burmeister, 1839)
  • Epeorus undulata Banks, 1924 (spell.)
  • Epeorus undulatus Banks, 1924 (syn.)
  • Heptagenia fusca (Walker, 1853) (hom.comb.)
  • Rhithrogena fusca (Walker, 1853) (hom.comb.)
  • Rhithrogena undulata (Banks, 1924) (syn.)
• Rhithrogena manifesta Eaton, 1885 [CAN:NE,NW;USA:NE,NW,SE]
  • Heptagenia manifesta (Eaton, 1885) (comb.)
  • Rhithrogena pellucida Daggy, 1945 (syn.)
• Rhithrogena morrisoni (Banks, 1924) [CAN:NW;MEX:SW;USA:NW,SW]
  • Epeorus morrisoni Banks, 1924 (orig.)
  • Iron petulans Seemann, 1927 (syn.)
  • Rhithrogena petulans (Seemann, 1927) (syn.)
• Rhithrogena notialis Allen & Cohen, 1977 [MEX:FS;CAMR]
• Rhithrogena plana Allen & Chao, 1978 [MEX:SW;USA:NW,SW]
  • Rhithrogena vitta Allen & Chao, 1978 (syn.)
• Rhithrogena robusta Dodds, 1923 [CAN:NW;USA:FN,NW,SW]
• Rhithrogena rubicunda Traver, 1937 [USA:SE]
• Rhithrogena serpenglena Burian, 2024 [CAN:FN,NE,NW;USA:NE,NW,SE]
  • Rhithrogena jejuna Eaton, 1885 (misid.)
• Rhithrogena uhari Traver, 1933 [USA:NE,SE]
• Rhithrogena virilis McDunnough, 1934 [CAN:NW;USA:NW]

• Spinadis simplex (Walsh, 1863) [CAN:NE;USA:NE,SE]
  • Anepeorus simplex (Walsh, 1863) (comb.)
  • Heptagenia simplex Walsh, 1863 (orig.)
  • Spinadis wallacei Edmunds & Jensen, 1974 (syn.)

• Stenacron candidum (Traver, 1935) [CAN:NE;USA:NE,SE]
  • Heptagenia candida (Traver, 1935) (comb.)
  • Stenonema candidum Traver, 1935 (orig.)
• Stenacron carolina (Banks, 1914) [CAN:NE;USA:NE,SE]
  • Ecdyonurus carolina (Banks, 1914) (comb.)
  • Heptagenia carolina Banks, 1914 (orig.)
  • Stenonema carolina (Banks, 1914) (comb.)
• Stenacron floridense (Lewis, 1974) [USA:SE]
  • Heptagenia floridensis (Lewis, 1974) (comb.)
  • Stenonema floridense Lewis, 1974 (orig.)
• Stenacron gildersleevei (Traver, 1935) [CAN:NE;USA:NE,SE]
  • Heptagenia gildersleevei (Traver, 1935) (comb.)
  • Stenonema gildersleevei Traver, 1935 (orig.)
• Stenacron interpunctatum (Say, 1839) [CAN:FN,NE,NW;USA:NE,NW,SE]
  • Baetis canadensis Walker, 1853 (syn.)
  • Baetis interpunctata Say, 1839 (orig.)
  • Ecdyonurus canadensis (Walker, 1853) (syn.)
  • Ecdyonurus frontalis (Banks, 1910) (syn.)
  • Ecdyonurus heterotarsalis McDunnough, 1933 (syn.)
  • Ecdyurus canadensis (Walker, 1853) (syn.)
  • Heptagenia canadensis (Walker, 1853) (syn.)
  • Heptagenia frontalis Banks, 1910 (syn.)
  • Heptagenia interpunctata (Say, 1839) (comb.)
  • Palingenia interpunctata (Say, 1839) (comb.)
  • Stenacron areion (Burks, 1953) (syn.)
  • Stenacron canadense (Walker, 1853) (syn.)
  • Stenacron frontale (Banks, 1910) (syn.)
  • Stenacron heterotarsale (McDunnough, 1933) (syn.)
  • Stenonema areion Burks, 1953 (syn.)
  • Stenonema affine Traver, 1933 (syn.)
  • Stenonema canadense (Walker, 1853) (syn.)
  • Stenonema conjunctum Traver, 1935 (syn.)
  • Stenonema frontale (Banks, 1910) (syn.)
  • Stenonema heterotarsale (McDunnough, 1933) (syn.)
  • Stenonema interpunctatum (Say, 1839) (comb.)
  • Stenonema majus Traver, 1935 (syn.)
  • Stenonema ohioense Traver, 1935 (syn.)
  • Stenonema proximum Traver, 1935 (syn.)
• Stenacron minnetonka (Daggy, 1945) [USA:NE,SE]
  • Heptagenia minnetonka (Daggy, 1945) (comb.)
  • Stenonema minnetonka Daggy, 1945 (orig.)
• Stenacron pallidum (Traver, 1933) [USA:NE,SE]
  • Heptagenia pallida (Traver, 1933) (comb.)
  • Stenonema pallidum Traver, 1933 (orig.)

• Stenonema femoratum (Say, 1823) [CAN:FN,NE,NW;USA:NE,SE,SW]
  • Baetis femorata Say, 1823 (orig.)
  • Ecdyonurus femoratus (Say, 1823) (comb.)
  • Ecdyonurus tripunctatus (Banks, 1910) (syn)
  • Heptagenia femorata (Say, 1823) (comb.)
  • Heptagenia tripunctata Banks, 1910 (syn.)
  • Siphlurus femoratus (Say, 1823) (comb.)
  • Stenonema birdi Traver, 1935 (syn.)
  • Stenonema scitulum Traver, 1935 (syn.)
  • Stenonema tripunctatum (Banks, 1910) (syn.)

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ISONYCHIIDAE

• Isonychia arida (Say, 1839) [USA:NE,SE]
  • Baetis arida Say, 1839 (orig.)
  • Isonychia pictipes Traver, 1934 (syn.)
• Isonychia berneri Kondratieff & Voshell, 1984 [USA:SE]
• Isonychia bicolor (Walker, 1853) [CAN:NE;USA:NE,SE]
  • Chirotonetes albomanicatus Needham, 1905 (syn.)
  • Isonychia albomanicata (Needham, 1905) (syn.)
  • Isonychia christina Traver, 1934 (syn.)
  • Isonychia circe Traver, 1934 (syn.)
  • Isonychia fattigi Traver, 1934 (syn.)
  • Isonychia harperi Traver, 1934 (syn.)
  • Isonychia matilda Traver, 1934 (syn.)
  • Isonychia pacoleta Traver, 1932 (syn.)
  • Isonychia sadleri Traver, 1934 (syn.)
  • Palingenia bicolor Walker, 1853 (orig.)
  • Siphlurus bicolor (Walker, 1853) (comb.)
• Isonychia campestris McDunnough, 1931 [CAN:NE,NW;USA:NW]
  • Isonychia sicca campestris McDunnough, 1931 (orig.)
• Isonychia diversa Traver, 1934 [USA:SE] (recently extinct)
• Isonychia georgiae McDunnough, 1931 [USA:SE]
  • Isonychia annulata Traver, 1932 (syn.)
  • Isonychia notata Traver, 1932 (syn.)
  • Isonychia thalia Traver, 1934 (syn.)
• Isonychia hoffmani Kondratieff & Voshell, 1984 [USA:SE]
• Isonychia intermedia (Eaton, 1885) [MEX:SW;USA:SW]
  • Chirotonetes intermedius Eaton, 1885 (orig.)
• Isonychia obscura Traver, 1932 [CAN:NE;USA:NE,SE]
• Isonychia rufa McDunnough, 1931 [CAN:NE,NW;USA:NE,NW,SE]
• Isonychia sayi Burks, 1953 [CAN:NE;USA:NE,SE]
• Isonychia serrata Traver, 1932 [USA:SE]
• Isonychia sicca (Walsh, 1862) [CAN:NE;MEX:FS,SW:USA:NE,NW,SE,SW;CAMR]
  • Baetis sicca Walsh, 1862 (orig.)
  • Chirotonetes mancus (Eaton, 1871) (syn.)
  • Chirotonetes siccus (Walsh, 1862) (comb.)
  • Isonychia edmundsi Kondratieff & Voshell, 1984 (syn.)
  • Isonychia manca Eaton, 1871 (syn.)
  • Isonychia sicca manca Eaton, 1871 (syn.)
  • Isonychia sicca sicca (Walsh, 1862) (stat.)
  • Siphlurus siccus (Walsh, 1862) (comb.)
• Isonychia similis Traver, 1932 [USA:SE]
  • Isonychia aurea Traver, 1932 (syn.)
• Isonychia tusculanensis Berner, 1948 [USA:SE]
• Isonychia velma Needham, 1932 [USA:NW]

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LEPTOHYPHIDAE

• Ableptemetes dicinctus (Allen & Brusca, 1973) [MEX:FS;CAMR]
  • Leptohyphes dicinctus Allen & Brusca, 1973 (orig.)
  • Tricorythopsis dicinctus (Allen & Brusca, 1973) (comb.)

• Allenhyphes vescus (Allen, 1978) [MEX:FS,SW;USA:SW]
  • Allenhyphes michaeli (Allen, 1978) (syn.)
  • Leptohyphes michaeli Allen, 1978 (syn.)
  • Leptohyphes vescus Allen, 1978 (orig.)

• Asioplax dolani (Allen, 1967) [USA:SE]
  • Leptohyphes dolani Allen, 1967 (orig.)
• Asioplax edmundsi (Allen, 1967) [CAN:NW;USA:NW,SW]
  • Asioplax corpulenta (Kilgore & Allen, 1973) (syn.)
  • Tricorythodes corpulentus Kilgore & Allen, 1973 (syn.)
  • Tricorythodes edmundsi Allen, 1967 (orig.)
• Asioplax numinuh Wiersema, McCafferty & Baumgardner, 2001 [MEX:FS,SW;USA:SW]
• Asioplax texana (Traver, 1935) [MEX:SW;USA:SE,SW]
  • Tricorythodes texanus Traver, 1935 (orig.)

• Homoleptohyphes dimorphus (Allen, 1967) [MEX:SW;USA:NW,SW]
  • Tricorythodes dimorphus Allen, 1967 (orig.)
• Homoleptohyphes mirus (Allen, 1967) [MEX:SW;USA:SW]
  • Leptohyphes baumanni Kilgore & Allen, 1973 (syn.)
  • Leptohyphes mirus Allen, 1967 (orig.)
• Homoleptohyphes quercus (Kilgore & Allen, 1973) [USA:SW]
  • Leptohyphes quercus Kilgore & Allen, 1973 (orig.)

• Leptohyphes alleni Brusca, 1971 [MEX:FS]
• Leptohyphes apache Allen, 1967 [MEX:FS,SW;USA:NW,SW;CAMR]
  • Leptohyphes hispidus Allen & Brusca, 1973 (syn.)
  • Leptohyphes lumas Allen & Brusca, 1973 (syn.)
  • Leptohyphes spiculatus Allen & Brusca, 1973 (syn.)
  • Leptohyphes succinus Allen, 1978 (syn.)
• Leptohyphes berneri Traver, 1958 [MEX:FS]
• Leptohyphes ferruginus Allen & Brusca, 1973 [MEX:FS;USA:SW;CAMR]
  • Leptohyphes ferrugineus Allen & Brusca, 1973 (spell.)
  • Leptohyphes piraticus Allen, 1978 (syn.)
• Leptohyphes lestes Allen & Brusca, 1973 [MEX:FS,SW;USA:SW;CAMR]
• Leptohyphes musseri Allen, 1967 [MEX:FS,SW]
  • Leptohyphes brunneus Allen & Brusca, 1973 (syn.)
• Leptohyphes nigripunctum Traver, 1943 [MEX:FS;SAMR]
  • Leptohyphes nigripunctatum Traver, 1943 (spell.)
  • Leptohyphes nigripunctus Traver, 1943 (spell.)
• Leptohyphes peterseni Ulmer, 1920 [MEX:FS;CAMR;SAMR]
• Leptohyphes pilosus Allen & Brusca, 1973 [MEX:FS]
• Leptohyphes sabinas Traver, 1958 [MEX:FS,SW;USA:SW;CAMR]
  • Leptohyphes castaneus Allen, 1967 (syn.)
  • Leptohyphes consortis Allen & Brusca, 1973 (syn.)
  • Leptohyphes tarsos Allen & Murvosh, 1987 (syn.)
• Leptohyphes zalope Traver, 1958 [MEX:FS,SW:USA:SW;CAMR]
  • Leptohyphes zapode Traver, 1958 (spell.)
  • Leptohyphes vulturnus Allen, 1978 (syn.)
  • Leptohyphes zelus Allen, 1978 (syn.)

• Tricoryhyphes condylus (Allen, 1967) [MEX:SW;USA:NW,SW;CAMR]
  • Tricorythodes condylus Allen, 1967 (orig.)
• Tricoryhyphes mulaiki (Traver, 1959) [MEX:FS,SW;USA:SW]
  • Tricorythodes mulaiki Traver, 1959 (orig.)

• Tricorythodes albilineatus Berner, 1946 [USA:NE,SE,SW]
• Tricorythodes allectus (Needham, 1905) [CAN:NE;USA:NE,SE]
  • Caenis allecta Needham, 1905 (orig.)
  • Tricorythodes atratus (McDunnough, 1923) (syn.)
  • Tricorythodes peridius Burks, 1953 (syn.)
  • Tricorythus allectus (Needham, 1905) (comb.)
  • Tricorythus atratus McDunnough, 1923 (syn.)
• Tricorythodes cobbi Alba-Tercedor & Flannagan, 1995 [CAN:NE;USA:NE]
• Tricorythodes comus Traver, 1959 [MEX:FS]
• Tricorythodes curvatus Allen, 1977 [USA:SE,SW]
• Tricorythodes explicatus (Eaton, 1892) [CAN:NE,NW;MEX:FS,SW;USA:NE,NW,SW;CAMR]
  • Tricorythodes fallacina McDunnough, 1939 (syn.)
  • Tricorythodes fallax Traver, 1935 (syn.)
  • Tricorythodes minutus Traver, 1935 (syn.)
  • Tricorythus explicatus Eaton, 1892 (orig.)
• Tricorythodes fictus Traver, 1935 [MEX:SW,FS;USA:NE,NW,SW]
  • Tricorythodes angulatus Traver, 1959 (syn.)
• Tricorythodes mosegus Alba-Tercedor & Flannagan, 1995 [CAN:NE,NW;USA:NE]
  • Tricorythodes mosequs Alba-Tercedor & Flannagan, 1995 (spell.)
• Tricorythodes notatus Allen & Brusca, 1973 [MEX:FS]
• Tricorythodes robacki (Allen, 1967) [USA:NE,SE,SW]
  • Leptohyphes robacki Allen, 1967 (orig.)
• Tricorythodes sordidus Allen, 1967 [MEX:FS,SW;CAMR]
• Tricorythodes stygiatus McDunnough, 1931 [CAN:NE;USA:NE,SE]
• Tricorythodes ulmeri Allen & Brusca, 1973 [MEX:FS,SW]

• Vacupernius packeri (Allen, 1967) [MEX:FS,SW;USA:SW,CAMR;SAMR]
  • Leptohyphes packeri Allen, 1967 (orig.)
  • Leptohyphes paraguttatus Allen, 1978 (syn.)
  • Leptohyphes phalarobranchus Kilgore & Allen, 1973 (syn.)
  • Vacupernius paraguttatus (Allen, 1978) (syn.)

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LEPTOPHLEBIIDAE

• Choroterpes albiannulata McDunnough, 1924 [CAN:NW;USA:NW]
• Choroterpes alliannulata McDunnough, 1924 (spell.)
• Choroterpes basalis (Banks, 1900) [CAN:NE;USA:NE,SE]
  • Choroterpes ferruginea Traver, 1934 (syn.)
  • Choroterpes fusca Spieth, 1938 (syn.)
  • Choroterpes hubbelli Berner, 1946 (syn.)
  • Leptophlebia basalis Banks, 1900 (orig.)
• Choroterpes inornata Eaton, 1892 [MEX:FS,SW;USA:NW,SW]
  • Choroterpes oaxacaensis Brusca & Allen, 1973 (syn.)
• Choroterpes terratoma Seemann, 1927 [USA:NW,SW]
• Choroterpes ungulus Lugo-Ortiz & McCafferty, 1996 [MEX:FS]

• Farrodes flavipennis Dominguez, Molineri & Peters, 1996 [MEX:SW;CAMR]
• Farrodes maya Dominguez, 1999 [MEX:FS]
• Farrodes mexicanus Dominguez, 1999 [MEX:FS;USA:SW]
• Farrodes otiesa Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW;CAMR]
• Farrodes reevesi Randolph & McCafferty, 2001 [MEX:FS]
• Farrodes texanus Davis, 1987 [MEX:SW;USA:SW;CAMR]
• Farrodes tulija Dominguez, Molineri & Peters, 1996 [MEX:FS]

• Habrophlebia vibrans Needham, 1907 [CAN:NE;USA:NE,SE]
  • Habrophlebia Jacosa Banks, 1914 (spell.)
  • Habrophlebia jocosa Banks, 1914 (syn.)
  • Habrophlebia pusilla Traver, 1932 (syn.)

• Habrophlebiodes americana (Banks, 1903) [CAN:NE;USA:NE,SE]
  • Choroterpes betteni Needham, 1908 (syn.)
  • Habrophlebia americana Banks, 1903 (orig.)
  • Habrophlebiodes americanus (Banks, 1903) (spell.)
  • Habrophlebiodes betteni (Needham, 1908) (syn.comb.)
  • Leptophlebia betteni (Needham, 1908) (syn.comb.)
• Habrophlebiodes annulata Traver, 1934 [USA:SE]
• Habrophlebiodes brunneipennis Berner, 1946 [USA:SE]
• Habrophlebiodes celeteria Berner, 1975 [USA:SE]
• Habrophlebiodes celetaria Berner, 1975 (spell.)

• Hydrosmilodon primanus (Eaton, 1892) [MEX:FS;CAMR;SAMR]
  • Thraulus primanus Eaton, 1892 (orig.)
  • Traverella primanus (Eaton, 1892) (comb.)
  • Traverella primana (Eaton, 1892) (spell.)

• Leptophlebia bradleyi Needham, 1932 [CAN:NE;USA:NE,SE,SW]
  • Paraleptophlebia bradleyi (Needham, 1932) (comb.)
• Leptophlebia cupida (Say, 1823) [CAN:FN,NE,NW;USA:NE,NW,SE]
  • Baetis ignava Hagen, 1861 (syn.)
  • Blasturus austrinus Traver, 1932 (syn.)
  • Blasturus collinus Traver, 1932 (syn.)
  • Blasturus concinnus (Walker, 1853) (syn.)
  • Blasturus cupidus (Say, 1823) (comb.)
  • Blasturus gravastellus Eaton, 1884 (syn.)
  • Cloe quebecensis Provancher, 1876 (syn.)
  • Ephemera cupida Say, 1823 (orig.)
  • Ephemera hebes Walker, 1853 (syn.)
  • Ephemerella quebecensis (Provancher, 1876) (syn.)
  • Heptagenia quebecensis (Provancher, 1876) (syn.)
  • Leptophlebia austrina (Traver, 1932) (syn.)
  • Leptophlebia collina (Traver, 1932) (syn.)
  • Leptophlebia concinna (Walker, 1853) (syn.)
  • Leptophlebia gravastella (Eaton, 1884) (syn.)
  • Leptophlebia hebes (Walker, 1853) (syn.)
  • Leptophlebia ignava (Hagen, 1861) (syn.)
  • Leptophlebia pallipes (Walker, 1853) (syn.)
  • Palingenia concinna Walker, 1853 (syn.)
  • Palingenia pallipes Walker, 1853 (syn.)
  • Potamanthus concinnus (Walker, 1853) (syn.)
  • Potamanthus cupidus (Say, 1823) (comb.)
• Leptophlebia intermedia (Traver, 1932) [CAN:NE;USA:NE,SE]
  • Blasturus grandis Traver, 1932 (syn.)
  • Blasturus intermedius Traver, 1932 (orig.)
  • Leptophlebia grandis (Traver, 1932) (syn.)
  • Leptophlebia intermedius (Traver, 1932) (spell.)
• Leptophlebia johnsoni McDunnough, 1924 [CAN:NE;USA:NE,SE]
  • Blasturus gracilis Traver, 1932 (syn.)
  • Leptophlebia gracilis (Traver, 1932) (syn.)
• Leptophlebia konza Burian, 2001 [USA:NE]
• Leptophlebia nebulosa (Walker, 1853) [CAN:FN,NE,NW;USA:NE,NW,SE]
  • Blasturus nebulosus (Walker, 1853) (comb.)
  • Palingenia nebulosa Walker, 1853 (orig.)
  • Potamanthus nebulosus (Walker, 1853) (comb.)
  • Potamanthus odonatus Walsh, 1862 (syn.)
• Leptophlebia pacifica (McDunnough, 1933) [USA:NW]
  • Blasturus pacificus McDunnough, 1933 (orig.)
  • Blasturus vibex Traver, 1934 (syn.)
  • Leptophlebia vibex (Traver, 1934) (syn.)

• Neochoroterpes kossi (Allen, 1974) [USA:SW]
  • Choroterpes kossi Allen, 1974 (orig.)
  • Choroterpes sp. 1 Lugo-Ortiz & McCafferty, 1995 (syn.)
• Neochoroterpes nanita (Traver, 1934) [USA:SW]
  • Choroterpes crocatus Allen, 1974 (syn.)
  • Choroterpes manita Traver, 1934 (spell.)
  • Choroterpes nanita Traver, 1934 (orig.)
  • Neochoroterpes crocatus (Allen, 1974) (syn.)
• Neochoroterpes oklahoma (Traver, 1934) [MEX:FS,SW;USA:NE,NW,SW]
  • Choroterpes mexicana Allen, 1974 (syn.)
  • Choroterpes mexicanus Allen, 1974 (spell.)
  • Choroterpes oklahoma Traver, 1934 (orig.)
  • Choroterpes sp. 2 Lugo-Ortiz & McCafferty, 1995 (syn.)
• Neochoroterpes orientalis Henry, 1993 [MEX:FS]

• Neoleptophlebia adoptiva (McDunnough, 1929) [CAN:NE,NW;USA:NE,NW,SE]
  • Leptophlebia adoptiva McDunnough, 1929 (orig.)
  • Paraleptophlebia adoptiva (McDunnough, 1929) (comb.)
• Neoleptophlebia assimilis (Banks, 1914) [CAN:NE;USA:NE,SE]
  • Leptophlebia assimilis Banks, 1914 (orig.)
  • Paraleptophlebia assimilis (Banks, 1914) (comb.)
• Neoleptophlebia heteronea (McDunnough, 1924) [CAN:NW;USA:NW,SW]
• Leptophlebia heteronea McDunnough, 1924 (orig.)
• Paraleptophlebia heteronea (McDunnough, 1924) (comb.)
• Neoleptophlebia memorialis (Eaton, 1884) [CAN:NW;MEX:SW;USA:NW,SW]
• Leptophlebia memorialis Eaton, 1884 (renam.)
• Leptophlebia pallipes Hagen, 1875 (hom.: L. pallipes (Walker, 1853))
• Paraleptophlebia memorialis (Eaton, 1884) (comb.)
• Paraleptophlebia pallipes (Hagen, 1875) (hom.comb.)
• Neoleptophlebia mollis (Eaton, 1871) [CAN:NE;USA:NE,NW,SE]
• Cloe mollis Hagen, 1861 (nom. nud.)
• Leptophlebia mollis Eaton, 1871 (orig.)
• Leptophlebia mollis Hagen, 1861 (nom. nud.)
• Paraleptophlebia mollis (Eaton, 1871) (comb.)
• Neoleptophlebia swannanoa (Traver, 1932) [USA:SE]
• Leptophlebia swannanoa Traver, 1932 (orig.)
• Paraleptophlebia swannanoa (Traver, 1932) (comb.)
• Neoleptophlebia temporalis (McDunnough, 1926) [CAN:NW;USA:NW,SW]
• Leptophlebia temporalis McDunnough, 1926 (orig.)
• Paraleptophlebia temporalis (McDunnough, 1926) (comb.)

• Paraleptophlebia altana Kilgore & Allen, 1973 [USA:NW,SW]
• Paraleptophlebia aquilina Harper & Harper, 1986 [USA:NW]
• Paraleptophlebia associata (McDunnough, 1924) [USA:NW,SW]
  • Leptophlebia associata McDunnough, 1924 (orig.)
  • Paraleptophlebia compar Traver, 1934 (syn.)
• Paraleptophlebia bicornuta (McDunnough, 1926) [CAN:NW;USA:NW]
  • Leptophlebia bicornuta McDunnough, 1926 (orig.)
• Paraleptophlebia brunneipennis (McDunnough, 1924) [CAN:NW;USA:NW]
  • Leptophlebia brunneipennis McDunnough, 1924 (orig.)
• Paraleptophlebia cachea Day, 1954 [USA:NW]
• Paraleptophlebia calcarica Rowbotham & Allen, 1988 [USA:NE,SE]
  • Paraleptophlebia calcarita Robotham & Allen, 1988 (spell.)
  • Paraleptophlebia calcarica Robotham & Allen, 1988 (orig.author.spell.)
• Paraleptophlebia californica Traver, 1934 [USA:SW]
• Paraleptophlebia clara (McDunnough, 1933) [USA:NW]
  • Leptophlebia clara McDunnough, 1933 (orig.)
• Paraleptophlebia debilis (Walker, 1853) [CAN:FN,NE,NW;USA:FN,NE,NW,SE,SW]
  • Baetis debilis Walker, 1853 (orig.)
  • Leptophlebia debilis (Walker, 1853) (comb.)
  • Leptophlebia mollis (Hagen, 1861) (id.)
  • Leptophlebia separata Ulmer, 1920 (invalid renam.)
  • Paraleptophlebia debris (Walker, 1853) (spell.)
• Paraleptophlebia falcula Traver, 1934 [USA:NW;ASIA]
• Paraleptophlebia georgiana Traver, 1934 [USA:SE]
• Paraleptophlebia gregalis (Eaton, 1884) [CAN:NW;USA:NW,SW]
  • Leptophlebia gregalis Eaton, 1884 (orig.)
  • Leptophlebia invalida McDunnough, 1926 (syn.)
  • Paraleptophlebia invalida (McDunnough, 1926) (syn.)
• Paraleptophlebia guttata (McDunnough, 1924) [CAN:FN,NE;USA:NE,SE]
  • Leptophlebia guttata McDunnough, 1924 (orig.)
• Paraleptophlebia helena Day, 1952 [USA:NW]
• Paraleptophlebia jeanae Berner, 1955 [USA:NE,SE]
• Paraleptophlebia jenseni McCafferty & Kondratieff, 1999 [USA:NW]
• Paraleptophlebia kirchneri Kondratieff & Durfee, 1994 [USA:SE]
• Paraleptophlebia moerens (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,SE]
  • Leptophlebia moerens McDunnough, 1924 (orig.)
• Paraleptophlebia ontario (McDunnough, 1926) [CAN:NE;USA:NE,SE]
  • Leptophlebia ontario McDunnough, 1926 (orig.)
• Paraleptophlebia packii (Needham, 1927) [USA:NW]
  • Leptophlebia packii Needham, 1927 (orig.)
  • Paraleptophlebia packi (Needham, 1927) (spell.)
• Paraleptophlebia placeri Mayo, 1939 [USA:NW]
• Paraleptophlebia praepedita (Eaton, 1884) [CAN:NE,NW;USA:NE,NW,SE]
  • Leptophlebia praepedita Eaton, 1884 (orig.)
• Paraleptophlebia quisquilia Day, 1952 [USA:NW]
• Paraleptophlebia rufivenosa (Eaton, 1884) [CAN:NW;USA:NW,SW]
  • Leptophlebia rufivenosa Eaton, 1884 (orig.)
• Paraleptophlebia sculleni Traver, 1934 [USA:NW]
• Paraleptophlebia sticta Burks, 1953 [USA:NE]
• Paraleptophlebia strandii (Eaton, 1901) [CAN:FN;USA:FN;ASIA;EURO]
• Leptophlebia strandii Eaton, 1901 (orig.)
• Paraleptophlebia lunata Tshernova, 1952 (syn.)
• Paraleptophlebia strigula (McDunnough, 1932) [CAN:NE;USA:NE,SE]
  • Leptophlebia strigula McDunnough, 1932 (orig.)
• Paraleptophlebia traverae McCafferty & Kondratieff, 1999 [USA:NW]
• Paraleptophlebia vaciva (Eaton, 1884) [CAN:NW;USA:FN,NW]
  • Leptophlebia vaciva Eaton, 1884 (orig.)
• Paraleptophlebia volitans (McDunnough, 1924) [CAN:NE;USA:NE,SE]
  • Leptophlebia volitans McDunnough, 1924 (orig.)
• Paraleptophlebia zayante Day, 1952 [USA:NW]

• Thraulodes brunneus Koss, 1966 [MEX:FS,SW;USA:SW;CAMR]
  • Thraulodes sp. A Allen & Brusca, 1978 (syn.)
• Thraulodes cryptodrilus Nieto & Dominguez, 2001 [MEX:FS]
• Thraulodes eccentricus Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW;CAMR]
  • Thraulodes sp. B Allen & Brusca, 1978 (syn.)
• Thraulodes ephippiatus Traver & Edmunds, 1967 [MEX:FS]
• Thraulodes gonzalesi Traver & Edmunds, 1967 [MEX:FS,SW;USA:NW,SW;CAMR]
  • Thraulodes salinus Kilgore & Allen, 1973 (syn.)
• Thraulodes hilaris (Eaton, 1892) [MEX:FS;CAMR]
  • Thraulus hilaris Eaton, 1892 (orig.)
• Thraulodes humeralis Navas, 1935 [MEX:FS;CAMR]
• Thraulodes lunatus Traver & Edmunds, 1967 [MEX:FS,SW]
• Thraulodes mexicanus (Eaton, 1884) [MEX:FS;CAMR]
  • Thraulus mexicanus Eaton, 1884 (orig.)
• Thraulodes pacaya McCafferty, Baumgardner & Guenther, 2004 [MEX:FS,SW;CAMR]
  • Thraulodes sp. C. Allen & Brusca, 1978 (syn.)
• Thraulodes packeri Traver & Edmunds, 1967 [MEX:FS,SW;CAMR]
• Thraulodes spangleri Traver & Edmunds, 1967 [MEX:FS;CAMR]
• Thraulodes speciosus Traver, 1934 [MEX:FS,SW;USA:SW;CAMR]
  • Thraulodes arizonicus McDunnough, 1942 (syn.)
• Thraulodes tenulineus Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW;USA:SW]
  • Thraulodes sp. D Allen & Brusca, 1978 (syn.)
• Thraulodes zonalis Traver & Edmunds, 1967 [MEX:FS;CAMR]

• Traverella albertana (McDunnough, 1931) [CAN:NW;MEX:FS,SW;USA:NE,NW,SW;CAMR]
  • Thraulus albertanus McDunnough, 1931 (orig.)
  • Traverella castanea Kilgore & Allen, 1973 (syn.)
  • Traverella sp. A Allen, 1973 (syn.)
• Traverella lewisi Allen, 1973 [USA:NE,NW,SE]
• Traverella longifrons Lugo-Ortiz & McCafferty, 1996 [MEX:FS;CAMR]
  • Traverella sp. B Allen, 1973 (syn.)
• Traverella presidiana (Traver, 1934) [MEX:FS,SW;USA:SW]
  • Thraulus presidianus Traver, 1934 (orig.)
• Traverella promifrons Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW;USA:SW;CAMR]
  • Traverella sp. C Allen, 1973 (syn.)
• Traverella sallei (Navas, 1935) [MEX]
  • Thraulus sallei Navas, 1935 (orig.)

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METRETOPODIDAE

• Metretopus alter Bengtsson, 1930 [USA:FN;ASIA;EURO]
• Metretopus borealis (Eaton, 1871) [CAN:FN,NE,NW;USA:NE;ASIA;EURO]
  • Heptagenia borealis Eaton, 1871 (orig.)
  • Metretopus norvegicus Eaton, 1901 (syn.)
  • Metretopus norwegicus Eaton, 1901 (spell.)
  • Rhithrogena borealis (Eaton, 1871) (comb.)

• Siphloplecton basale (Walker, 1853) [CAN:FN,NE,NW;USA:NE,SE]
  • Baetis basalis Walker, 1853 (orig.)
  • Heptagenia basalis (Walker, 1853) (comb.)
  • Siphloplecton basalis (Walker, 1853) (spell.)
  • Siphloplecton flexus (Clemens, 1913) (syn.)
  • Siphloplecton signatum Traver, 1932 (syn.)
  • Siphlurus flexus Clemens, 1913 (syn.)
• Siphloplecton brunneum Berner, 1978 [USA:SE]
• Siphloplecton costalense Spieth, 1938 [USA:NE,SE]
• Siploplecton costalense Spieth, 1938 (spell.)
• Siphloplecton fuscum Berner, 1978 [USA:SE]
• Siphloplecton interlineatum (Walsh, 1863) [CAN:FN,NE,NW;USA:NE,SE]
  • Baetis femorata Walsh, 1862 (hom.: B. femorata Say, 1823)
  • Baetis interlineata Walsh, 1863 (renam.)
• Siphloplecton simile Berner, 1978 [USA:SE]
• Siphloplecton speciosum Traver, 1932 [USA:SE]

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NEOEPHEMERIDAE

• Neoephemera bicolor McDunnough, 1925 [CAN:NE;USA:NE,SE]
• Neoephemera sp. A Jacobus & McCafferty, 2002 (syn.)
• Neoephemera compressa Berner, 1956 [USA:SE]
• Neoephemera eatoni Holland, Beaty & Jacobus, 2016 [USA:SE]
• Neoephemera sp. B McCafferty, Jacobus, Provonsha & Wiersema, 2017 (syn.)
• Neoephemera purpurea (Traver, 1931) [USA:SE]
  • Oreianthus purpureus Traver, 1931 (orig.)
• Neoephemera youngi Berner, 1953 [USA:SE]
  • Oreianthus sp. 1 Traver, 1937 (syn.)

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OLIGONEURIIDAE

• Homoeoneuria alleni Pescador & Peters, 1980 [MEX:SW;USA:NE,NW,SW]
• Homoeoneuria ammophila (Spieth, 1938) [USA:NE,NW]
  • Oligoneuria ammophila Spieth, 1938 (orig.)
• Homoeoneuria cahabensis Pescador & Peters, 1980 [USA:SE]
• Homoeoneuria dolani Edmunds, Berner & Traver, 1958 [USA:SE]
• Homoeoneuria salviniae Eaton, 1881 [MEX:FS;CAMR]

• Lachlania dencyanna Koss, 1970 [USA:SW]
  • Lachlania dencyannae Koss, 1970 (spell.)
• Lachlania fusca (Navas, 1924) [MEX:FS;CAMR]
• Lachlania iops Allen & Cohen, 1977 [MEX:FS,SW]
• Lachania iops Allen & Cohen, 1977 (spell.)
• Lachlania saskatchewanensis Ide, 1941 [CAN:NW;MEX:SW;USA:NE,NW,SW]
  • Lachlania powelli Edmunds, 1951 (syn.)

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PALINGENIIDAE

• Pentagenia robusta McDunnough, 1926 [USA:NE,SE] (recently extinct)
• Pentagenia vittigera (Walsh, 1862) [CAN:NE;USA:NE,SE,SW]
  • Palingenia vittigera Walsh, 1862 (orig.)
  • Pentagenia quadripunctata Walsh, 1863 (syn.)

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POLYMITARCYIDAE

• Campsurus cuspidatus Eaton, 1871 [MEX:FS,SW;CAMR]
• Campsurus decoloratus (Hagen, 1861) [MEX:SW;USA:SW;CAMR]
  • Hexagenia decolorata (Hagen, 1861) (comb.)
  • Palingenia decolorata Hagen, 1861 (orig.)

• Ephoron album (Say, 1824) [CAN:NE,NW;USA:NE,NW,SE]
  • Baetis alba Say, 1824 (spell.)
  • Baetis albus Say, 1824 (orig.)
  • Palingenia alba (Say, 1824) (comb.)
  • Polymitarcys albus (Say, 1824) (comb.)
• Ephoron leukon Williamson, 1802 [CAN:NE;USA:NE,SE,SW]

• Tortopsis primus (McDunnough, 1924) [CAN:NE;MEX:SW;USA:NE,SE,SW]
  • Campsurus manitobensis Ide, 1941 (syn.)
  • Campsurus primus McDunnough, 1924 (orig.)
  • Tortopus manitobensis (Ide, 1941) (syn.)
  • Tortopus primus (McDunnough, 1924) (comb.)
• Tortopsis puella (Pictet, 1843) [USA:SE,SW]
  • Campsurus puella (Pictet, 1843) (comb.)
  • Campsurus incertus Traver, 1935 (syn.)
  • Palingenia puella Pictet, 1843 (orig.)
  • Tortopus incertus (Traver, 1935) (syn.)
  • Tortopus puella (Pictet, 1843) (comb.)

• Tortopus circumfluus Ulmer, 1942 [USA:SW]

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POTAMANTHIDAE

• Anthopotamus distinctus (Traver, 1935) [CAN:NE;USA:NE,SE]
  • Potamanthus distinctus Traver, 1935 (orig.)
• Anthopotamus myops (Walsh, 1863) [CAN:NE;USA:NE,SE]
  • Anthopotamus inequalis (Needham, 1909) (syn.)
  • Anthopotamus rufous (Argo, 1927) (syn.)
  • Ephemera myops Walsh, 1863 (orig.)
  • Potamanthus inequalis Needham, 1909 (syn.)
  • Potamanthus medius Banks, 1908 (syn.)
  • Potamanthus myops (Walsh, 1863) (comb.)
  • Potamanthus rufous Argo, 1927 (syn.)
  • Potamanthus rufus Argo, 1927 (syn.)
• Anthopotamus neglectus disjunctus Bae & McCafferty, 1991 [USA:SE]
• Anthopotamus neglectus neglectus (Traver, 1935) [CAN:NE;USA:NE]
  • Anthopotamus neglectus (Traver, 1935) (comb.)
  • Potamanthus neglectus Traver, 1935 (orig.)
• Anthopotamus verticis (Say, 1839) [CAN:NE;USA:NE,NW,SE]
  • Anthopotamus diaphanus (Needham, 1907) (syn.)
  • Anthopotamus walkeri (Ide, 1935) (syn.)
  • Baetis verticis Say, 1839 (orig.)
  • Ecdyurus verticis (Say, 1839) (comb.)
  • Ephemera flaveola Walsh, 1862 (syn.)
  • Heptagenia verticis (Say, 1839) (comb.)
  • Potamanthus betteni Morgan, 1913 (syn.)
  • Potamanthus diaphanus Needham, 1907 (syn.)
  • Potamanthus flaveola (Walsh, 1862) (syn.)
  • Potamanthus verticis (Say, 1839) (comb.)
  • Potamanthus walkeri Ide, 1935 (syn.)
  
  
• Potamanthus formosus Eaton, 1892 [USA:HI;ASIA] (intro.)
  • Potamanthodes formosus (Eaton, 1892) (comb.)
  • Potamanthodes kamonis (Imanishi, 1940 (syn.)
  • Potamanthus iyonis Matsumura, 1931 (syn.)
  • Potamanthus kamonis Imanishi, 1940 (syn.)

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PSEUDIRONIDAE

• Pseudiron centralis McDunnough, 1931 [CAN:NE,NW;USA:NE,NW,SE]
  • Pseudiron meridionalis Traver, 1935 (syn.)

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SIPHLONURIDAE

• Edmundsius agilis Day, 1953 [USA:NW,SW]

• Parameletus chelifer Bengtsson, 1908 [CAN:FN,NE,NW;USA:FN;ASIA;EURO]
  • Eatonia borealis Bengtsson, 1904 (nom. nud.)
  • Palmenia fennica Aro, 1910 (syn.)
  • Potameis elegans Bengtsson, 1909 (syn.)
  • Sparrea norvegica Esben-Petersen, 1909 (syn.)
• Parameletus columbiae McDunnough, 1938 [CAN:NW;USA:FN,NW]
• Parameletus croesus (McDunnough, 1923) [CAN:NE;USA:NE]
  • Siphlonuroides croesus McDunnough, 1923 (orig.)
• Parameletus midas (McDunnough, 1923) [CAN:NE;USA:NE]
  • Siphlonuroides midas McDunnough, 1923 (orig.)

• Siphlonisca aerodromia Needham, 1909 [CAN:NE;USA:NE]

• Siphlonurus alternatus (Say, 1824) [CAN:FN,NE,NW;USA:FN,NE;ASIA;EURO]
  • Baetis alternata Say, 1824 (spell.)
  • Baetis alternatus Say, 1824 (orig.)
  • Baetis annulata Walker, 1853 (syn.)
  • Baetis annulatus Walker, 1853 (syn.)
  • Baetis femorata Provancher, 1876 (syn.)
  • Siphlurella alternata (Say, 1824) (comb.)
  • Siphlurella oblita Bengtsson, 1909 (syn.)
  • Siphlurella thomsoni Bengtsson, 1909 (syn.)
  • Siphlurus alternans (Say, 1824) (spell.)
  • Siphlurus alternatus (Say, 1824) (comb.)
  • Siphlurus linnaeanus Eaton, 1871 (syn.)
• Siphlonurus autumnalis McDunnough, 1931 [CAN:NW;USA:NW]
• Siphlonurus barbaroides McDunnough, 1929 [CAN:NE;USA:NE]
• Siphlonurus barbarus McDunnough, 1924 [CAN:NE;USA:NE]
• Siphlonurus columbianus McDunnough, 1925 [CAN:NW;USA:NW,SW]
• Siphlonurus decorus Traver, 1932 [USA:SE]
• Siphlonurus demaryi Kondratieff & Voshell, 1981 [CAN:NE;USA:NE]
• Siphlonurus luridipennis (Burmeister, 1839) [USA:SE] (recently extinct)
  • Baetis luridipennis Burmeister, 1839 (orig.)
  • Ecdyurus luridipennis (Burmeister, 1839) (comb.)
  • Heptagenia luridipennis (Burmeister, 1839) (comb.)
• Siphlonurus marginatus Traver, 1932 [USA:NE,SE]
• Siphlonurus marshalli Traver, 1934 [CAN:NE;USA:NE,SE]
• Siphlonurus minnoi Provonsha & McCafferty, 1982 [USA:NE,SE]
• Siphlonurus mirus (Eaton, 1885) [CAN:NE;USA:NE,SE]
  • Siphlurus mirus Eaton, 1885 (orig.)
• Siphlonurus noveboracana (Lichtenstein, 1796) (dub.) [USA:NE]
  • Baetis noveboracana (Lichtenstein, 1796) (comb.)
  • Ephemera noveboracana Lichtenstein, 1796 (orig.)
• Siphlonurus occidentalis (Eaton, 1885) [CAN:FN,NW;MEX:FS,SW;USA:FN,NW,SW]
  • Siphlonurus inflatus McDunnough, 1931 (syn.)
  • Siphlurella occidentalis (Eaton, 1885) (comb.)
  • Siphlurus occidentalis Eaton, 1885 (orig.)
• Siphlonurus phyllis McDunnough, 1923 [CAN:FN,NE,NW;USA:NE,NW]
• Siphlonurus quebecensis (Provancher, 1878) [CAN:NE;USA:NE,SE]
  • Baetis canadensis Provancher, 1876 (hom.)
  • Siphlurus quebecensis Provancher, 1878 (orig.)
  • Siphlonurus triangularis Clemens, 1915 (syn.)
• Siphlonurus rapidus McDunnough, 1924 [CAN:NE;USA:NE]
• Siphlonurus securifer McDunnough, 1926 [CAN:NE;USA:NE]
• Siphlonurus spectabilis Traver, 1934 [CAN:FN;USA:NW,SW]
  • Siphlonurus maria Mayo, 1939 (syn.)
• Siphlonurus typicus (Eaton, 1885) [CAN:NE;USA:NE,SE]
  • Siphlonurus berenice McDunnough, 1923 (syn.)
  • Siphlonurus bernice McDunnough, 1923 (syn.spell.)
  • Siphlonurus novangliae McDunnough, 1924 (syn.)
  • Siphlurus typicus Eaton, 1885 (orig.)