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 facetum Koehler, 1922 . Figures 10 a, b Ophiomusium facetum Koehler, 1922 ; Guille, 1981 Holotype USNM 41370 Nogas Id, Sulu Sea, 1752m . Dr Marc Eleaume, Paris Museum, has recently informed me that 23 syntypes of this species are in their collection: NMNH 10300, ex- CREVETTIERE 1971. Main Features : Disc with smooth plates and large separated radial shields. Many small scales centrally. Lateral arms plates long and high, smooth, with 6–7 small, evenly placed arm spines. Dorsal arm plates small throughout. 2 ventral arm plates, 2 pairs of exposed tentacle pores, each with a large scale. A large central interradial plate is present. A second specimen, but not a type , from the same locality ( USNM E41368 ) has 1 or 2 rudimentary ventral arm plates distal to the main plates.