Key to the Species of Cyprinidae

24a. (From 23b.) Lateral scales taller than wide and outlined with dark pigment, creating a diamond-shaped pattern; diamonds both above and below lateral line in most species (best developed on scales below lateral line); dark scapular bar behind and separate from operculum; large oval caudal spot connected to lateral stripe may be present at base of caudal fin (if present, never with broad black band in dorsal fin); pharyngeal teeth 0, 4-4, 0 or 1, 4-4, 1.
Genus Cyprinella

24b. (From 23b.) Flank scales either taller than wide or rounded, but not outlined for diamond shaped pattern; dark vertical scapular bar behind operculum absent; large oval caudal spot present only if with broad black band in dorsal fin; pharyngeal teeth 0, 4-4, 0 or 1, 4-4, 1 or 2, 4-4, 2.

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