Key to the Species of Pteronotropis

5a. (From 3b.) Anterior rays of dorsal fin short, when depressed falling short of tips of posterior rays; anal fin of males bright orange and not muted by dense coverage of melanophores.
orangetail shiner
Pteronotropis merlini

5b. (From 3b.) Anterior rays of depressed dorsal fin extending to or beyond tips of posterior rays; orange anal fin muted by dense coverage of melanophores.
broadstripe shiner

Pteronotropis euryzonus