Costa, 1852 (Jan.)
Smooth or with radiating lines or spinules on pedicle valve, shell thin and penetrated by minute caeca; deltidial plates narrow, pedicle collar short, sessile. Hinge teeth with feeble dental plates; crura long, converging, crural processes short; descending branches of loop converging. Dorsal pedicle muscles attached to inner side of cardinalia; mantles, body wall, brachial membrane, and bases of filaments strongly spiculate.
Source: Moore, 1965.
The following species that belong to this genus occurs in this region:
Platidia anomioides