Ameletidae

Ameletus ludens. 1985. Washington Co., Hall (1985).

Baetidae

Acentrella nadineae. 07/14/2014. Wilson Run, 39.5581, -81.1656, L Hughes.
Acentrella parvula. 08/22/2000. Duck Cr., 39.5569, -81.4163, E Moore.
Acentrella turbida. 1985. Washington Co., Hall (1985).
Baetis flavistriga. 1985. Washington Co., Hall (1985).
Iswaeon anoka. 08/30/2013. Wolf Cr., 39.541187, -81.6418, E Moore.
Procloeon viridoculare. 9/23/2015. Little Muskingum R., 39.4094, -81.3586, L Hughes.

Caenidae

Caenis diminuta. 1995. Duck Cr. at MC R 42, VI-15-1995, WP McCaffert.
Caenis latipennis. 1998. Duck Cr., Little Muskingum R., W. Br Little Hocking R., Ohio Biol. Survey.
Caenis hilaris. 1995. Belpre Twp. (Ohio R.), across Shell Chemical, Rt. 681, Vi-30-1995. J Stewart (adults), Ohio Biol. Survey.
Sparbarus lacustris. 09/10/2015. Little Muskingum R., 39.5369, -81.2228; 09/16/2015. Little Muskingum R., 39.5631, -81.2039, L Hughes

Ephemerelladae

Eurylophella verisimilis. 1985. Washington Co., Hall (1985).
Eurylophella funeralis. 1987. (Baker Run); Sweeney & Vannote (1987); 1994. Trib to Baker Run, Moss Run, Little Muskingum R., Funk & Sweeney (1994).
Eurylophella temporalis. 09/25/2009. Wolf Cr., 39.541187, -81.6418, M Gray.

Ephemeridae

Ephemera varia. 1998. Baker Run, Little West Br. Little Hocking R, West Branch Little Hocking R.), Ohio Biol. Survey.
Hexagenia atrocaudata. 07/28/2015. Wingett Run, 39.5386, -81.24, C McKnight.
Hexagenia bilineata. 1998. Little Muskingum R.), Ohio Biol. Survey; 07/23/2015. Eightmile Cr., 40.988686, -81.93814, C McKnight.
Hexagenia limbata. 1998. Muskingum R., Ohio Biol. Survey; Purdue Entomol. Res. Ctr.

Heptageniidae

Epeorus namatus. 1985. Washington Co.; Hall (1985).
Heptagenia marginalis. 09/15/2006. Muskingum R., 39.5286, -81.5147, M Gray.
Stenonema exigiuum*. 09/23/2015. Little Muskingum R., 39.4481, -81.3364, L Hughes.
Stenonema femoratum. 1998. Little W. Br. Little Hocking R., Colorado State U.; 08/28/2018. Hog Run, 39.485903, -8127044, MJ Bolton.
Stenonema pulchellum*. 09/11/2013. Aldridge Run, 39.483978, -81.79267, E Moore.
Stenonema vicarium*. 1985. Washington Co.; Hall (1985); 08/28/2018. Hog Run, 39.485903, -81.27044, MJ Bolton.
* These species are listed as Maccaffertium by Mayfly Central.

Leptohyphidae

Tricorythodes allectus. 09/23/2015. Little Muskingm R., 39.4481, -81.3364, L Hughes.

Leptophlebiidae

Choroterpes basalis. 08/28/2018. Hog Run, 39.485903, -81.27044, MJ Bolton.

Potamanthidae

Anthopotamus myops. 1998. Ohio R. OEPA.