Apollonaster Halpern 1970b

Apollonaster Halpern 1970b: 9; Clark and Downey 1992: 229; A.M. Clark 1993: 243; Durán-González et al. 2006: 56 (checklist); Alvarado 2011: 266 (checklist).

Comments. Apollonaster is poorly studied and as of this writing has previously only been known from a single species (two known specimens in the USNM) in the tropical Atlantic from 40–1174 m (Clark & Downey 1992: 230). It displays morphological similarities with Ceramaster and to a lesser extent Peltaster a nd Sphaeriodiscus in that it displays shallow fasciolar channels, a pentagonal body shape (low R:r), and a general similarity in granule distribution on the abactinal and marginal plates.