Differs from Schizaster and Ova in having three gonopores. Differs from Aceste in having petaloid ambulacra and three, not two gonopores. Proraster has an ethmophract apical disc. Smith & Jeffery (2000) synonymized this taxon with Brisaster.
Markov, A. V. 1994. Morphology, systematics and phylogeny of schizasterid sea urchins. Trudy Paleontologicheskogo Instituta Rossiiskaya Akademiya Nauk 258, 94 pp, 4 pls [in Russian].
Smith, A. B. & Jeffery, C. H. 2000. Maastrichtian and Palaeocene echinoids: a key to world faunas. Special Papers in Palaeontology 63, 404 pp.