Key to the Species of Cyprinidae

7a. (From 6b.) Mouth inferior; lower jaw with conspicuous cartilaginous ridges separate from lower lip by groove; intestine long and coiled around swim bladder.
Genus Campostoma

7b. (From 6b.) Mouth inferior or terminal but without cartilaginous ridge on lower lip; intestine either long or short, but not looped around swim bladder.

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