Chaetaster Müller & Troschel, 1842

Gale, Andrew S., 2020, The fossil record of the asteroid (Echinodermata) family Chaetasteridae Sladen 1889 and subfamily Hyalothricinae Fisher, 1911, Zootaxa 4858 (1), pp. 144-150 : 145

Genus Chaetaster Müller & Troschel, 1842

Diagnosis. Delicately constructed 5-rayed asteroids with long, narrow arms, small discs; marginal, abactinal and actinal ossicles of nearly equal size and shape, with raised, flat-topped central region bearing a dense cluster of short, hyaline spines; proximal arm constructed of 13 extraxial plate rows (1 radial, 4 adradial, paired supero- and inferomarginals, 4 actinals), decreasing distally to 5 close to arm tip (1 radial, paired supero- and inferomarginals).

Type species. Asterias longipes Bruzelius, 1805

Remarks. Chaetaster includes a small group of living species (Mah, 2020), including, in addition to the type species (eastern central Atlantic), C. nodosus Perrier, 1875 (central western Atlantic, Gulf of Mexico), C. moorei Bell, 1894 (South China Sea), and C. vestitus Koehler, 1910 (Indian Ocean).