Notropis signipinnis Bailey & Suttkus, 1952 The flagfin shiner (Pteronotropis signipinnis) is a species of ray-finned fish in the family Cyprinidae (minnows), in the order Cypriniformes (carp).

This freshwater species is benthopelagic and usually occurs over sand near vegetation, in creeks, small rivers, and flowing pools and runs of headwaters.

The caudal, dorsal and anal fins are yellow or red-orange with black marginal rays.

It can be distinguished by its red fins, yellow tail spots, and smaller nuptial tubercles.

"Pteronotropis" means "winged keeled back", which refers to the breeding males' enlarged dorsal fin.