Zoroasteridae

The Zoroasteridae are one of three families of Asteroidea (sea stars) in the order Forcipulatida. It contains seven living genera and one extinct genus.

Genera
The living genera described are:
 * Bythiolophus Fisher, 1916 (monotypic)
 * B. acanthinus Fisher, 1916
 * Cnemidaster Sladen, 1889 (six species)
 * Doraster Downey, 1970 (monotypic)
 * D. constellatus Downey, 1970
 * Myxoderma Fisher, 1905 (five species)
 * Pholidaster Sladen, 1889 (monotypic)
 * P. squamatus Sladen, 1889
 * Sagenaster Mah, 2007 (monotypic)
 * S. evermanni (Fisher, 1905)
 * Zoroaster Thomson, 1873 (20 species)

The extinct genus known is:
 * Terminaster Hess, 1974†

Distribution
Species in this family are widespread, distributed mainly in Pacific, Atlantic, and Indian Oceans. A few are found in the Arctic and Antarctic Oceans.