A revision of Antarctic and some Indo-Pacific apodid sea cucumbers (Echinodermata: Holothuroidea: Apodida) Author O’Loughlin, P. Mark Author VandenSpiegel, Didier text Memoirs of Museum Victoria 2010 2010-12-31 67 61 95 https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-67-2010/pages-61-95/ journal article 10.24199/j.mmv.2010.67.06 1447-2554 12212210 5A8C650E-A34A-4072-A797-0A75D218DD7C Prototrochus Belyaev and Mironov, 1982 Diagnosis (after Gage and Billett 1986 ) . Myriotrochid with 10 tentacles; calcareous ring symmetrical, with dorsal and ventral plates subequal in size; dorsolateral radial plates with single anterior projection; wheels with teeth distributed regularly, pointing towards centre of hub; rods absent from body wall, sometime occurring in and around tentacles. Remarks . Belyaev and Mironov (1982) noted in erecting their new genus Prototrochus that the wheels of their included species Prototrochus bipartitodentatus ( Belyaev and Mironov, 1978 ) were exceptional within their diagnosis as there are small external teeth at the base of the internal teeth.