Cryptogemma phymatias is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.

It is angulated and tubercled on the angle, spiralled, with a short round base, small snout, and openly constricted suture.

Spirals — the shell is rather broadly carinated in the middle of the whorls by three fine threads, which are united and made prominent by a series of narrow elongated tubercles.

The body whorl is short, with a slightly tumid rounded base contracting into a small equal-sided snout.

The outer lip is very thin, with a very deep open U-shaped sinus, which is separated from the suture by a large broad triangular shelf.