Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea

Ophioplinthaca semele (A. H Clark, 1949) (IDSSE-EEB-SW0113: A–H) A dorsal disc B ventral disc C center of the disc D radial shield E оral frame F ventral arm G dorsal arm H lateral arm; Ophioplinthaca defensor Koehler, 1930 (IDSSE-EEB-SW0112: I–Q) I dorsal disc J ventral disc K center of the disc L disc spine M оral frame N lateral disc O dorsal arm P ventral arm Q lateral arm. Abbreviations: as adoral shield, dap dorsal arm plate, das dorsal arm spine, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (I); 1 mm (A, B, F–H, J, N–P); 500 µm (C–E, K, M, Q); 200 µm (L).