Key to the Species of Cyprinella

4a. (From 3a.) Anal fin rays usually 8; posteriorly, dark lateral stripe with discrete edges; lateral line positioned above lateral stripe posteriorly; anterior membranes of dorsal fin of females and non-breeding males with melanophores only along rays; in breeding males dorsal fin very darkly pigmented and snout yellow.
spotfin shiner

Cyprinella spiloptera

4b. (From 3a.) Anal fin rays usually 9; posteriorly, dark lateral stripe with diffuse edges; lateral line positioned centrally in lateral stripe posteriorly; anterior membranes of dorsal fin of females and non-breeding males with melanophores; in breeding males dorsal fin very darkly pigmented and snout red.
steelcolor shiner
Cyprinella whipplei