Key to the Species of Pimephales

1a. Mouth terminal and oblique; caudal spot absent; sides with herringbone lines; lateral line not extending to caudal fin; predorsal scale rows usually 23 to 26.
fathead minnow
Pimephales promelas

1b. Mouth subterminal to terminal; small dark caudal spot present; sides without herringbone lines; lateral line extending to base of caudal fin; predorsal scale rows usually 23 or less.

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