Taxonomic analysis of the genital plates and associated structures in Ophiuroidea (Echinodermata) Author Stöhr, Sabine 412800EB-AACE-4313-9810-61F89B740405 Swedish Museum of Natural History, Department of Zoology, Box 50007, 10405 Stockholm, Sweden. sabine.stohr@nrm.se text European Journal of Taxonomy 2024 2024-05-14 933 1 98 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2525/11335 journal article 10.5852/ejt.2024.933.2525 2118-9773 11198874 8F720F2B-BFBC-4CA1-BFF2-A2B8C7C8D3E1 Genus Amphilepis Ljungman , 186 Fig. 26 Type species Amphiura norvegica Ljungman, 1865 . Examined species Amphilepis norvegica . Oral GP Not identified among small disc scales near oral shields. Adradial GP Bar-like, curved, proximal end tailfin-like broadened and pointed or rounded, abradial ventrolateral edge with fin-like process, distal end with adradial condyle, bordered by deep groove on abradial side, proximal to condyle a large round patch of almost imperforate stereom, edges extending disc-like from main plate. Abradial GP Thin, flat, half-circular with concave adradial edge, strongly convex abradial edge, straight adradial articular edge to adGP. Part of ventral disc, encircling small genital opening. About ⅔ of length of adGP. Oral shields Inner side flat, with horizontal ridge across middle. Madreporite with large oval opening in centre. Radial shield Inner side with distal large domed condyle, bordered by curved, wide distal ledge, proximal to condyle an oval, almost imperforate patch.