Ameletidae
Ameletus lineatus. 1984;Stony Brook; Robertson
Baetidae
Acentrella parvula. 09/11/1991. Grand R., 41.7136, -81.2269. Ohio EPA Biologist. 09/20/2017. Grand R., 41.7261, -81.2383, MJ Bolton.
Acentrella turbida. 08/24/2016. Symmes Cr., 38.4847, -82.455, E Moore.
Acerpenna pygmaea. 09/20/2017. Grand R., 41.7261, -81.2383, MJ Bolton.
Baetis armillatus. 1991, 1994 Grand R., RM 6.4, 8.8, 13.6; OEPA
Baetis flavistriga. 1984. Stony Brook; Robertson (1984); 09/20/2017. E.Br. Chagrin R., 41.5897, -81.2994, E Moore.
Baetis intercalaris. 09/20/2019. E.Br. Chagrin R., 41.4897, -81.2994, E Moore.
Baetis tricaudatis. 1984. Stony Brook; Robertson (1984).
Centroptilum alamance. 1935. ( as Neocloeon alamance), Traver (1935).
Cloeon dipterum. 07/22/2014. Trib. Arcola Cr., 41.76673, -81.04398, MJ Bolton.
Labiobaetis propinquus.09/03/2014. Chagrin R., 41.57645, -81.41564, MJ Bolton.
Neocloeon sp. 08/08/2018. Trib. Arcola Cr., 41.77196, -81.40587, C McKnight.
Plauditus dubius. 09/11/1991. Lake Co., Grand R., 41.7136, -81.2269, Ohio EPA Biologist; 09/20/2017. Grand R., 41.7261, -81.2383, MJ Bolton.
Procloeon rubropictum. 1935. Lake Co., Traver (1935).
Procloeon viridoculare. 09/20/2017. Grand R., 41.7261, -81.2383, MJ Bolton.
Procloeon rivulare. 1935. Lake Co. Traver (1935). Not found by Ohio EPA since 1996.Baetiscidae
Baetisca lacustris. 1935; Willowick and Mentor Park, on the shore of Lake Erie; Traver (1935)
Ephemerellidae
Dannella simplex. 04/23/2015. Pearsons Cr., 41.6143, -81.3058, DH Dean.
Drunella cornutella. 1984.Stony Brook; Robertson (1984)
Eurylophella funeralis. 1935. near Kirkland, OH, E. Br. Chagrin R.; Traver (1935)
Eurylophella minimella. 1984.Stony Brook;; Robertson (1984).
Teloganopsis deficiens. 09/20/2017. Grand R., 41.7261, -81.2383, MJ Bolton. Ephemeridae
Hexagenia limbata. 1998. Purdue Entomol. Res. Ctr.
Hexagenia rigida. 1941. Lake Erie. Spieth (1941)Heptageniidae
Epeorus pleuralis. 1984. Stony Brook; Robertson (1984). Heptagenia flavescens.
Isonychiidae
09/04/2014. Chagrin R., 41.589649, -81.40254, MJ Bolton.
Heptagenia marginalis. 1935. Chagrin R., near Willoughby, OH.; Traver (1935)
Heptagenia pulla. 1935. Willowick, OH (Lake Erie ?); Traver (1935)
Leucrocuta aphrodite. Lake Co. (location not given), Purdue Entomol. Res. Center.
Leucrocuta hebe. 1935. Lake Co. near Kirkland (E. Br. Chagrin R.), near Leroy (Twp?), (Grand R.), Traver (1935)
Leucrocuta maculipennis. 1935. Near Kirkland (E. Br. Chagrin R.), Leroy and Painesville (Grand R.), Traver (1935)
Nixe lucidipennis. 1935. Willoughby, OH, (Chagrin R.); Traver (1935)
Nixe rusticalis. 1935.Willoughby (Chagrin R.) as Heptagenia rusticalus, Traver (1935). Stenonema femoratum. 1935. Kirkland (E. Br. Chagrin R.), Euclid (Lake Erie?), Traver (1935); 1984. Stony Brook, Robertson (1984); 09/05/2018. Trib. Pierson Cr., 41.60915, -81.30811, MJ Bolton.
Stenonema ithaca*. 1935. Willoughby (Chagrin R.), Traver (1935). This report discounted by Bednarik and McCafferty (1979).
Stenonema mediopunctatum*. 1935. (Chagrin R.) as Stenonema nepotellum, Traver (1935);
09/20/2017. E.Br. Chagrin R., 41.5897, -81.2994, E Moore.
Stenonema mexicanum integrum*. 08/25/2010. Chagrin R., 41.59176, -81.40685, M Gray. Stenonema modestum*. 08/18/2004. Paine Cr., 41.7175, -81.1706, MJ Bolton.
Stenonema pulchellum*. 09/20/2017. Grand R., 41.7261, -81.2383, MJ Bolton.
Stenonema terminatum*. 09/20/2017. E. Br. Chagrin R., 41.5897, -81.2994, E Moore.
Stenonema vicarium*. 1935. Lake Co., Traver (1935). [?Not in Traver (1935)]
1979. Chagrin R., Bednarik & McCafferty (1979).
1984. Stony Brook, Robertson (1984).
Stenacron candidum. 1935. Willoughby (Chagrin R.), Traver (1935); 1974. , Pleasant Valley (Chagrin R.), Lewis (1974).
Stenacron gildersleevei. 1935. Kirkland, (E. Br. Chagrin R.), Traver (1935); 1974. Trib. Chagrin R., Lewis (1974)
Stenacron interpunctatum. 1935. (East Cr., Traver (1935); 1974. Chagrin R., Paine Cr., Lewis (1974); 1984. Stony Brook, Roberson (1984).
*These species are listed as Maccaffertium by Mayfly Central.Isonychia bicolor. 1935; Lake Co.; (Kellog Cr.) Traver (1935)
Leptohyphidae
Tricorythodes allectus. 09/20/2017. E.Br. Chagrin R., 41.5897, -81.2994, E Moore.
Leptophlebiidae
Choroterpes basalis. 1935. Lake Co., LeRoy Twp. (Grand R.), Traver (1935).
Leptophlebia cupida. 1935. Lake Co. Willoughby (Chagrin R.), as B. cupidus, Traver (1935)
Neoleptophlebia mollis. 1984. Lake Co. (Stony Brook), Robertson (1984).
Paraleptophlebia adoptiva. 1984. Lake Co. (Stony Brook), Robertson (1984).
Paraleptophlebia debilis. 1935. Lake Co. (Bear Gully Cr.), Traver (1935).
Paraleptophlebia ontario. 1935. Lake Co., Willoughby, OH, (Chagrin R.); Traver (1935); 1984. Lake Co. (Stony Brook), Robertson (1984)Potamanthidae
Anthopotamus distinctus. 1935. Willoughby (Chagrin R.); Traver (1935)
1991. Willoughby (Chagrin R.); Bae & McCafferty (1991).
Anthopotamus verticis. 1936. Lake Co., Bolton, et al. (2019).