>>779773It is a derivation of a derivation of a "lizard-like" snout/mouth. Already present in many "monster-girl" designs that are based on dragons and such. Attempting to be patterned off of a lizard-like features, e.g. alligator, mythological dragons, and so forth. There is an attempt of fang-like indentations on the sides, for fangs that aren't there. There is a little sharp dip in the center mimicking a sort of snout, that isn't there.