An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea) Author Baker, Alan N. text Zootaxa 2016 4097 1 1 40 journal article 10.11646/zootaxa.4097.1.1 1bdc9f90-79e0-4265-b8b7-9057618b36db 1175-5326 270988 CD767562-3A19-4F4C-914D-80C50AD0D250 Ophiosphalma regulare (A. H. Clark, 1936) . Figures 58 a, b Ophiomusium regulare Clark, 1936 Holotype USNM E5194 Caroline station 45, Johnson-Smithsonian Expedition 1933, off Puerto Rico , 438– 548m . Main Features : Disc scales few and tumid, mostly primaries. Radial shields separated by three plates diminishing in size towards the arm. Dorsal arm plates throughout arm, with 3 rows of granules at the arm bases, granules extend ventrally. Narrow interradii Two arm spines, uppermost become hooked. Ventral arm plates present to 11th segment. Three exposed tentacle pores, each with 1 scale. Genital slits longer than first arm segment, bordered by papillae.