Benthopectinidae

Benthopectinidae is a family of sea stars containing at least 75 species in eight genera. It is the only family in the monotypic order Notomyotida.

These asteroids are deep-sea dwelling and have flexible arms. The inner dorso-lateral surface of the arms contain characteristic longitudinal muscle bands. Eight genera of deep-water species make up the majority of the family benthopectinidae, and many of its members are expected to have a greater range than is currently recognized.

Taxonomy
Nine genera are recognized:
 * Acontiaster Döderlein, 1921
 * Benthopecten Verrill, 1884
 * Cheiraster Studer, 1883
 * Gaussaster Ludwig, 1910
 * Myonotus Fisher, 1911
 * Nearchaster Fisher, 1911
 * Pectinaster Perrier, 1885
 * † Plesiastropecten Peyer, 1944
 * Pontaster Sladen, 1885