Ophiomusium ultima Hertz 1927

Baker, Alan N., 2016, An illustrated catalogue of type specimens of the bathyal brittlestar genera Ophiomusium Lyman and Ophiosphalma H. L. Clark (Echinodermata: Ophiuroidea), Zootaxa 4097 (1), pp. 1-40 : 24

Ophiomusium ultima Hertz 1927 .

Figures 38 a, b

Ophiomusa ultima Hertz, 1927 ; H. L. Clark, 1939.

Syntypes 3, ZMUC, Valdivia station 243, Menai Bay, Zanzibar, 400m; 4, BMNH 1948.5.26.437.8 John Murray Expedition station 105.

Main Features: Disc with large primary plates, and radial shields separated by a narrow plate, Interradial areas consist of a long narrow plate with smaller plates at the edge, which are “furry” with pointed granules. No dorsal arm plates, and only two ventral arm plates.

Lateral arm plates with fine pointed granules along their distal edges. Two small arm spines situated on a protruding ledge. No exposed tentacle pores. Oral papillae not well differentiated. Short genital slits, only ½ a lateral plate long. Large oral shields with one distal plate extending to the disc margin.