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 Ophiodermatidae Ljungman, 1867 Type genus Ophioderma Müller & Troschel, 1840 ( type species: O . longicauda ( Bruzelius, 1805 )) . Other genera Bathypectinura H.L. Clark, 1909b , Cryptopelta H.L. Clark, 1909b , Diopederma H.L. Clark, 1913 , Ophiarachnella Ljungman, 1872 , Ophiochasma Grube, 1868 , Ophiocormus H.L. Clark, 1915a , Ophiocryptus H.L. Clark, 1915b , Ophiocypris Koehler, 1930 , Ophiomidas Koehler, 1904 , Ophiopsammus Lütken, 1869 . Diagnosis Dorsal disc covered with granules. Dental plate fragmented, with finely meshed stereom, tooth sockets as broadly oval, not penetrating depressions with swollen borders, small tooth cluster on ventral end. Lateral arm plate with two proximal spurs, visible on external and internal surface.Arm spine articulation with weak sigmoidal fold, sunken in notches of distal plate edge. Remarks Ophiarachnella is polyphyletic and requires revision. The type species O. gorgonia Müller & Troschel, 1842 , however, is a confirmed ophiodermatid ( O’Hara et al. 2017 ).