Key to the Species of Lythrurus

6a. (From 5b.) Dorsal fin with melanophores on membranes basally (darkly pigmented in breeding male); distal band in dorsal fin dark and uniform width and intensity; pectoral fin with narrow subdistal band.
pretty shiner
Lythrurus bellus

6b. (From 5b.) Dorsal fin with little or no pigment basally; distal band in dorsal fin dark and widest anteriorly and narrowing and fading posteriorly; pigment in pectoral fin restricted to spot on distal portion of anterior 1 or 2 rays.
blacktip shiner

Lythrurus atrapiculus