Family Plumasteridae Gale, 2011

Plumasteridae Gale, 2011b: 82, fig. 13.

Diagnosis

Five- to multi-armed asteroids possessing broad, short concavo-convex adambulacrals which possess a single row of large, transverse spine pits; adambulacrals articulate by means of transversely arranged specialised surfaces; abactinal ossicles stellate, large, with a central boss with which a long, glassy spine articulates.

Assigned genera

Plumaster Wright, 1863 and Plesiastropecten Peyer, 1944 .

Remarks

Although Plesiastropecten is 5-rayed, the adambulacrals, abactinal ossicles and marginals are closely similar to those of Plumaster (see Gale 2011b) and the genus is accommodated here.