1. Three distinct longitdinal stripes on venter of abdomen. . . . . . . . . . . . . . . . . . . . . . . . 2
No such dark longitudinal stripes on venter of abdomen. . . . . . . Ameletus shepherdi *
2. Stripes (on venter of abdomen) wide, their edges not clearly defined; fused on last three sternites; no continuous pale line between each lateral stripe and the pleural fold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ameletus ludens
Stripes relatively narrower, edges clearly defined; fused only at posterior margin of sternite 9; a continuous white line present between each lateral stripe and pleural fold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ameletus lineatus
Note: These species of Ameletus are considered parthenogenic (Traver, 1935; Kondratieff & Meyer, 2010). Kondratieff & Meyer (2010) report a new species Ameletus janetae from West Virginia. It might also be found in adjacent areas of Ohio.
* A. shepherdi is not reported for Ohio but is listed for the NE in Mayfly Central, which could include Ohio
Key to Ohio Ameletus Nymph Species