Morphological diagnoses of higher taxa in Ophiuroidea (Echinodermata) in support of a new classification Author Stöhr, Sabine Author Hugall, Andrew F. Author Thuy, Ben Author Martynov, Alexander text European Journal of Taxonomy 2018 2018-03-21 416 1 35 journal article 22339 10.5852/ejt.2018.416 2eebb037-4ab1-433c-a9f6-8fe319e9fda9 3806109 AD094812-5768-43E9-BCC2-9226E69F0820 Family Ophiocomidae Ljungman, 1867 Type genus Ophiocoma L. Agassiz, 1836 ( type species: O . echinata ( Lamarck, 1816 )) . Other genera Breviturma Stöhr et al. 2013 stat. nov., Ophiarthrum Peters, 1851 , Ophiocomella A.H. Clark, 1939 , Ophiomastix Müller & Troschel, 1842 . Diagnosis Dorsal disc with granules, smooth spines or naked thickened skin. Oral plate with large abradial flange with horizontal grooves. Dental plate entire, dorsalmost sockets as large penetrating holes, with vertical septum, large cluster of teeth ventrally. Teeth with hyaline tip. Spine articulations very large, with dorsalward increase in size, freestanding on raised distal portion of lateral arm plates. Lateral arm plates with very small proximal spurs if any. Inner side of lateral arm plates with single, large perforation (putatively for bundled arm spine nerves). Remarks We raise Breviturma from subgeneric to generic level. Ophiocoma is polyphyletic and requires revision.