Baetidae

Acerpenna pygmaea. 08/13/2018. Beaver Cr., 40.449124, -84.5658, C McKnight.
Baetis flavistriga. 08/15/2018. Beaver Cr., 40.449124, -84.5658, C McKnight.
Baetis intercalaris. 09/08/2016. St. Marys R., 40.6906, -84.6125, C McKnight.

Heptageniidae

Stenonema femoratum. 09/14/2015. St. Marys R., 40.6811, -84.5806, C McKnight.
Stenonema terminatum*. 09/08/2016. St. Marys R., 40.6811, -84.5806, C McKnight.
*These species are listed as Maccaffertium by Mayfly Central.

Leptohyphidae

Tricorythodes allectus. 09/15/2015. St. Marys R., 40.7178, -84.6894, C McKnight.