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snout conical, short, roundedtop bucklers widely spaced
any bucklers behind D & A in 1 rowA 19-22 -
snout cónical, long, pointedtop bucklers crowded
buckers behind D & A pairedA 23-30 -
snout depressed, long
snout to barbels > barbels to mouthtail base long, depressed, completely covered with bony platesbases of barbels in curved line