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 Ophiomusium longispinum Koehler,1930 . Figure 18 a, b Syntypes (2) ZMUC OPH-500, Pacific Expedition station 7, North Banda Sea, 196 m . Main Features : Even-sized plates on disc apart from large interradials and oval radial shields. Interradial plates are ribbed. Arm spines almost a segment long, and present on dorsal surface of lateral arm plates. Two pairs of exposed tentacle pores each with a large scale. Shield-shaped oral shields, with many smaller plates between it and disc margin. Ventral arm plates visible until the 6th arm segment.