| Genus | Species | Subspecies | Author | Common Name | Last Sampled | Last Collectors | Where for All Dates? |
|---|---|---|---|---|---|---|---|
| Cinygmula | species ** | - | (NA) | 1991-05-21 | DAEtnier | Here | |
| Cinygmula | subaequalis | - | (Banks 1914) | Flat-headed mayfly | 2007-05-17 | ICStocks & EPT blitz 2 | Here |
| Epeorus | dispar | - | (Traver 1933) | Flat-headed mayfly | 2007-05-17 | REDeWalt | Here |
| Epeorus | fragilis | - | (Morgan 1911) | Flat-headed mayfly | 2001-12-07 | LMJacobus & JFMacDonald | Here |
| Epeorus | pleuralis | - | (Banks 1910) | Flat-headed mayfly | 2005-06-30 | JVaughn, PMcNichols & PRomeo | Here |
| Epeorus | rubidus | - | (Traver 1933) | Flat-headed mayfly | 2001-12-07 | LMJacobus & JFMacDonald | Here |
| Epeorus | rubidus/subpallidus | - | Flat-headed mayfly | 2011-06-12 | DAEtnier | Here | |
| Epeorus | species ** | - | (NA) | 2011-06-12 | DAEtnier | Here | |
| Epeorus | subpallidus | - | (Traver 1937) | Flat-headed mayfly | 2001-05-18 | CD & RPRandolph & LMJacobus | Here |
| Epeorus | vitreus | - | (Walker 1853) | Flat-headed mayfly | 2011-07-01 | BNichols & LKobelt | Here |
| Heptagenia | adaequata | - | McDunnough, 1924 | Flat-headed mayfly | 2005-07-14 | JVaughn, PMcNichols & PRomeo | Here |
| Heptagenia | julia | - | Traver, 1933 | Flat-headed mayfly | 2003-08-06 | I & M Aquatics Crew | Here |
| Heptagenia | maculipennis | - | Walsh 1863 | Flat-headed mayfly | 1991-09-20 | DAEtnier | Here |
| Heptagenia | marginalis | - | Banks 1910 | Flat-headed mayfly | 2011-06-30 | BNichols, LCollins & AVan Gunst | Here |
| Heptagenia | species ** | - | (NA) | 2011-06-12 | DAEtnier | Here | |
| Heptageniidae_genus * | species ** | - | (NA) | 2011-06-12 | DAEtnier | Here | |
| Leucrocuta | aphrodite | - | (McDunnough 1926) | Flat-headed mayfly | 2007-05-17 | REDeWalt | Here |
| Leucrocuta | hebe | - | (McDunnough 1924) | Flat-headed mayfly | 2001-07-01 | I & M Aquatics Crew | Here |
| Leucrocuta | juno | - | (McDunnough, 1924) | Flat-headed mayfly | 2011-06-30 | BNichols, LCollins & AVan Gunst | Here |
| Leucrocuta | maculipennis | - | (Walsh 1863) | Flat-headed mayfly | 2011-06-12 | DAEtnier | Here |
| Leucrocuta | species ** | - | (NA) | 2011-07-01 | BNichols, LKobelt & MJPetersen | Here | |
| Leucrocuta | species A | - | Flat-headed mayfly | 2007-05-17 | ICStocks & EPT blitz 2 | Here | |
| Leucrocuta | thetis | - | (Traver 1935) | Flat-headed mayfly | 2011-06-12 | DAEtnier | Here |
| Maccaffertium | bednariki | - | (McCafferty 1981) | Flat-headed mayfly | 1991-09-20 | DAEtnier | Here |
| Maccaffertium | carlsoni | - | (Lewis 1974) | Flat-headed mayfly | 2003-07-30 | I & M Aquatics Crew | Here |
| Maccaffertium | ithaca | - | (Clemens & Leonard 1924) | Flat-headed mayfly | 2011-07-01 | BNichols, LKobelt & MJPetersen | Here |
| Maccaffertium | mediopunctatum | arwini | (Bednarik & McCafferty 1979) | Flat-headed mayfly | 1993-12-15 | SJFraley & DAEtnier | Here |
| Maccaffertium | mediopunctatum | mediopunctatum | (McDunnough 1926) | Flat-headed mayfly | 1994-09-14 | GSalansky & JLButcher | Here |
| Maccaffertium | mediopunctatum | - | Flat-headed mayfly | 2003-08-13 | I & M Aquatics Crew | Here | |
| Maccaffertium | meririvulanum | - | (Carle & Lewis 1978) | Flat-headed mayfly | 2005-06-30 | JVaughn, PMcNichols & PRomeo | Here |
| Maccaffertium | modestum | - | (Banks 1910) | Flat-headed mayfly | 2011-07-01 | BNichols, LKobelt & MJPetersen | Here |
| Maccaffertium | pudicum | - | (Hagen 1861) | Flat-headed mayfly | 2011-07-01 | BNichols, LKobelt & MJPetersen | Here |
| Maccaffertium | sinclairi | - | (Lewis 1979) | Flat-headed mayfly | 2002-08-13 | I & M Aquatics Crew | Here |
| Maccaffertium | species ** | - | (NA) | 2007-05-16 | REDeWalt & DAEtnier | Here | |
| Maccaffertium | terminatum | terminatum | (Walsh 1862) | Flat-headed mayfly | 2001-07-07 | REDeWalt | Here |
| Maccaffertium | terminatum | - | Flat-headed mayfly | 2003-06-11 | I & M Aquatics Crew | Here | |
| Maccaffertium | vicarium | - | (Walker 1853) | Flat-headed mayfly | 2007-05-18 | CRParker | Here |
| Nixe | species ** | - | (NA) | 1999-09-09 | I & M Aquatics Crew | Here | |
| Rhithrogena | amica | - | Traver 1935 | Flat-headed mayfly | 2011-07-01 | BNichols, LKobelt & MJPetersen | Here |
| Rhithrogena | anomala | - | McDunnough 1928 | Flat-headed mayfly | 2007-05-18 | REDeWalt & LMJacobus | Here |
| Rhithrogena | exilis | - | Traver 1933 | Flat-headed mayfly | 2003-08-06 | I & M Aquatics Crew | Here |
| Rhithrogena | fasciata | - | Traver 1933 | Flat-headed mayfly | 2007-05-18 | LMJacobus | Here |
| Rhithrogena | fuscifrons | - | Traver, 1933 | Flat-headed mayfly | 2007-05-18 | REDeWalt & LMJacobus | Here |
| Rhithrogena | n species | - | Flat-headed mayfly | 2001-05-21 | CD & RPRandolph & LMJacobus | Here | |
| Rhithrogena | species ** | - | (NA) | 2011-07-01 | BNichols & LKobelt | Here | |
| Rhithrogena | uhari | - | Traver 1933 | Flat-headed mayfly | 2002-09-26 | LMJacobus | Here |
| Rhithrogena/Epeorus | species ** | - | (NA) | 2001-05-16 | CD & RPRandolph & LMJacobus | Here | |
| Stenacron | candidum | - | (Traver 1935) | Flat-headed mayfly | 1994-06-14 | DAEtnier | Here |
| Stenacron | carolina | - | (Banks 1914) | Flat-headed mayfly | 2005-06-23 | JVaughn, PMcNichols & PRomeo | Here |
| Stenacron | interpunctatum | - | (Say 1839) | Flat-headed mayfly | 2011-07-01 | BNichols & LKobelt | Here |
| Stenacron | pallidum | - | (Traver 1933) | Flat-headed mayfly | 2011-07-01 | BNichols, LKobelt & MJPetersen | Here |
| Stenacron | species ** | - | (NA) | 2011-06-12 | DAEtnier | Here | |
| Stenonema | carlsoni | - | Lewis 1974 | Flat-headed mayfly | 1991-05-19 | DAEtnier | Here |
| Stenonema | femoratum | - | (Say 1823) | Flat-headed mayfly | 2002-08-07 | I & M Aquatics Crew | Here |
| Stenonema | ithaca | - | (Clemens & Leonard 1924) | Flat-headed mayfly | 1991-09-09 | DAEtnier et al. | Here |
| Stenonema | pudicum | - | (Hagen 1861) | Flat-headed mayfly | 1991-05-22 | DAEtnier et al. | Here |
| Stenonema | sinclairi | - | Lewis 1979 | Flat-headed mayfly | 1995-06-15 | SJFraley & DAEtnier | Here |
| Stenonema | species ** | - | (NA) | 2011-06-12 | DAEtnier | Here | |
| Total Number of Species = 44 | |||||||