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 Astrophiuridae Sladen, 1879a Type genus Astrophiura Sladen, 1879a ( Type species: A . permira Sladen, 1879b ). Other genera Ophiomisidium Koehler, 1914 , Ophiophycis Koehler, 1901 . Diagnosis Dorsal disc composed of very obvious primary plates, interradial plates and radial shields, few or no disc scales. Single apical ventralmost tooth. No genital papillae, no arm combs. Strongly paedomorphic genera with reduced skeleton; Astrophiura with highly modified lateral arm plates on proximal joints. Arm spine articulation as simple muscle opening, bordered by thickened stereom, nerve opening reduced.