Baetidae

Acentrella turbida. 08/25/2016. Huron R., 41.2908, -82.6375, C McKnight.
Acerpenna pygmaea. 08/25/2016. Huron R., 41.2908, -82.6375, C McKnight.
Baetis flavistriga. 08/25/2016. Huron R., 41.3917, -82.6069, C McKnight.
Baetis intercalaris. 08/25/2016. Huron R., 41.2908, -82.6375, C McKnight.
Plauditus dubius. 08/25/2016. Huron R., 41.2908, -82.6375, C McKnight.
Procloeon viridoculare. 08/25/2016. Huron R., 41.2908, -82.6375, C McKnight.

Caenidae

Caenis latipennis. 1998. Vermmilion R., Purdue Entomol. Res. Ctr.

Ephemeridae

Ephemera simulans. 1962. Erie Co. (L. Erie), Britt (1962).
Hexagenia atrocaudata. 07/17/2002. Clayton Ditch, 41.323, -82.6787, C McKnight.
Hexagena bilineata. Erie Co. (L Erie?). Purdue Entomol. Res. Ctr.

Heptageniidae

Stenonema exigiuum*. 08/25/2016. Huron R., 41.3017, -82.6069, C McKnight.
Stenonema femoratum. Erie Co. (E. Fork Vermilion R.) Ohio Biol. Survey. 08/25/2016. Huron R., 41.2908, -82.6375, C McKnight.
Stenonema pulchellum*. 08/25/2018. Huron R., 41.2908, -82.6375, C McKnight.
Stenonema terminatum*. 08/25/2018. Huron R., 41.3017, -82.6069, C McKnight.
*. This species is listed as Maccaffertium by Mayfly Central.

Leptohyphidae

Tricorythodes allectus. 08/25/2016. Huron R., 41.3017, -82.6069, C McKnight.