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snout conical, short, roundedtop bucklers widely spaced
any bucklers behind D & A in 1 rowAcipenser brevirostrum, Shortnose SturgeonA 19-22 -
snout cónical, long, pointedtop bucklers crowded
buckers behind D & A pairedAcipenser oxyrinchus, Atlantic SturgeonA 23-30 -
snout depressed, long
snout to barbels > barbels to mouthtail base long, depressed, completely covered with bony platesScaphirhynchus albus, Pallid Sturgeonbases of barbels in curved line