Menke, 1828
Shell calcareous, punctate, punctae in brachial valve branching arborescently toward distal end; brachial valve usually conical, pedicle valve subconical or convex when free, conforming to shape of surface of attachment when fixed. Principal muscles consists of two pairs of adductors traversing shell dorsoventrally and two pairs of oblique muscles. Vascula lateralia of both valves pinnate, vascula media seemingly absent. Recent species with anus posteriorly placed on midline of shell, no marginal setae.
Source: Moore, 1965.
The following taxa that belong to this family occur in this region:
Genus Crania
Crania anomala