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 Suborder Ophiurina Müller & Troschel, 1840 sensu O’Hara et al. 2017 Diagnosis Genital papillae on adradial genital plate form an arm comb (secondarily lost in Astrophiuridae ) at the distal end of the plate. Cluster of teeth on ventral part of dental plate. Lateral arm plates generally much more fragile than in Ophiomusina . Many strongly paedomorphic taxa in which arm combs and oral tooth clusters may be reduced or absent. Second tentacle pore outside of mouth slit or opening into it but never concealed.