-
snout > 77% eyepredorsal scales 13chin ends in projecting triangular plate
roof of mouth: teeth smallA 9
anus 8-10 scales behind pelvic base -
snout < 77% eyepredorsal scales 12chin short, no projecting triangular plate
roof of mouth: teeth smallA 8
anus 2-3 scales behind pelvic base -
snout flattened, long, (> eye)palatine teeth: strong, in broad bands
vomer: 1 pr large fangsanus 8-10 scales behind pelvic base