Thyoninae Panning, 1949

Thandar, Ahmed S., 2021, Nomenclatural changes in some sea cucumbers with the erection of a new genus and description of a Thyone? juvenile (? n. sp.) from the Gulf of California (Echinodermata: Holothuroidea: Dendrochirotida), Zootaxa 5026 (4), pp. 507-526 : 511

Subfamily Thyoninae Panning, 1949

Remarks. Smirnov (2012) raised Panning’s (1949) subfamily Thyoninae to family rank and this classification is here utilised. Within the family three species currently classified in the genus Stolus (sensu Panning 1949) do not strictly belong in it. These include the Caribbean Stolus cognatus ( Lampert, 1885) with usually equal or subequal tentacles and simple, smooth plates in the body wall, and S. rapax ( Koehler & Vaney, 1908) from the Bay of Bengal and S. kilberti Rajpal & Thandar, 1999 from the east coast of South Africa, both with smooth, reticulated plates in the body wall. While the writer was tempted to revive Deichmann’s (1954) genus Thyoneria (unaccepted by WoRMS, 732056, accessed 16 June 2021) for S. cognatus this step is here not taken (see Remarks under this species) but the latter two species are here assigned to a new genus Pseudostolus n. gen. In addition, three other species, currently standing in Thyone ( T. pseudofusus Deichmann, 1930 ; T. parafusus Deichmann, 1941 and T. uniannulata Sluiter, 1914 ) are here transferred to the genus Stolus , whose diagnosis is herein amended to take in these forms.