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)

Abstract

This paper includes several nomenclatural changes in dendrochirotid holothuroids, mostly based on materials from the USNM. These include the erection of a new genus Pseudostolus for two Indo-Pacific Stolus species [(S. kilberti Rajpal & Thandar, 1999 and S. rapax Koehler & Vaney (1908)], re-assignment of Havelockia uniannulatus (Sluiter, 1914), Thyone pseudofusus Deichmann 1930, T. parafusus Deichmann, 1941 and T. axiologa H.L. Clark, 1938, to the genus Stolus, and re-assignment of Havelockia nozawai (Mitsukuri, 1912) and Thyone adinopoda Pawson & Miller, 1981 to the genus Sclerothyone Thandar, 1989. In addition, a lectotype is designated for (T. vilis Sluiter, 1901), based on the study of type material at the ZMUA. The Caribbean Stolus cognatus is also described and commented on and a single, perhaps juvenile specimen from the Gulf of California is described as Thyone ? n. sp.

Designation of a neotype for the dendrochirotid holothuroid, Thyone fusus (Müller) (Echinodermata: Holothuroidea: Dendrochirotida: Thyonidae)

“…in his subsequent papers (Thandar 2021;Thandar & Arumugam 2022), and more recently, in his comprehensive monograph of the southern African sea cucumbers (Thandar 2022).…”

“…, after reviewing the 66 putative species within Thyone Oken, 1815 based on examinations of available specimens and literature accounts and the current co-author's visits to several foreign institutions, reduced the number of species to 46. Some of these re-assignments have already been published [(see Thandar (2021) & Thandar & Arumugam (2022)]. The main taxonomic character to justify these decisions was the structure of the calcareous ring with the ossicle assemblage of the introvert.…”

Afrocucumis africana (Semper, 1867) (Holothuroidea: Dendrochirotida:Cladolabidae), new addition to the holothuroid fauna of Pakistan

“…However, WoRMS (accessed 02/08/2023) gives Smirnov's classification as an alternative representation. Smirnov's ( 2012) system was used by Thandar (2018Thandar ( , 2021, Thandar & Arumugam (2022) and Thandar (2022), the latter in his extensive monograph of the holothuroid fauna of southern Africa.…”