Pectinidae

Rafinesque, 1815

Shells variable in size; ovate; usually with one valve more convex than the other; some species may be equivalve.
Umbones central with triangular auricles on either side. Hinge line is straight.
Sculpture variable, may be smooth with radial ribs or folds and some species with concentric sculpture. Left valve usually more brightly coloured than the right.

Pedinae

Bronn, 1862

Mimachlamys

Iredale, 1929
Mimachlamys gloriosa

Chlamydinae

Teppner, 1922

Scaeochlamys

Iredale, 1929
Scaeochlamys livida