Austrocochlea quadrasi a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

The imperforate shell has a conical shape and consists of five whorls.

The minute tubercles at the base of the callous, slightly oblique columella are rather more conspicuous than in that species.

The numerous revolving lirae and the three keels are granulose.

The convex base of the shell is strongly ridged and brightly spotted.