Dall, 1895
Shell inequivalve, right valve more convex than left one; inequilateral. Ligament external and internal, latter component in an oval chondrophore. No hinge teeth. Umbones typically with a discontinuity in the calcification. Pallial line with a sinus.
Source: Hayward, 1990.
The following subtaxa of this family occur in the region:
Genus Cochlodesma
Cochlodesma praetenue