A new sea star of the genus Hippasteria (Asteroidea: Goniasteridae) from the Aleutian Islands Author Clark, Roger N. Author Jewett, Stephen C. text Zootaxa 2011 2963 48 54 journal article 10.5281/zenodo.278198 1081b889-544a-4454-b4f6-98d3bbcef5b0 1175-5326 278198 Genus Hippasteria Gray, 1840 Goniasteridae with large, swollen disk, and broad, short rays. Abactinal plates roundish, with peripheral fringe of minute spinelets or granules, and bearing a single spine, tubercle or bivalve pedicellaria. Marginal plates large, quadrate to rounded fringed with spinelets or granules and bearing one to five large spines, tubercles, or large bivalve pedicellaria. Adambulacral plates with one to three furrow and one or two subadambulacral spines.