Phylogenetic revision of the Hippasterinae (Goniasteridae; Asteroidea): systematics of deep sea corallivores, including one new genus and three new species Author Mah, Christopher Author Nizinski, Martha Author Lundsten, Lonny text Zoological Journal of the Linnean Society 2010 2010-09-28 160 2 266 301 http://dx.doi.org/10.1111/j.1096-3642.2010.00638.x journal article 10.1111/j.1096-3642.2010.00638.x 0024-4082 HIPPASTERIA MAMMIFERA DJAKONOV, 1950 Djakonov, 1950: 54 ( 1968: 45 ), 1952: 409. Occurrence: Okhotsk Sea. 97 m . Comments: This species was described by Djakonov (1950) as a separate species based on extremely swollen and hemispherical marginal and abactinal plates. This character is plesiomorphic to H. spinosa (and to a certain extent, H. phrygiana ), which undermines the distinctiveness of this species and further lends support to its synonymy with H. spinosa . Material examined: None.