Thyone Oken, 1815

Yamana, Yusuke, Nakaguchi, Kazumitsu, Yamaguchi, Shuhei, Katoh, Mikio, Ogawa, Akito & Ohtsuka, Susumu, 2021, Four new dendrochirotid holothurians collected from the Seto Inland Sea and the western part of the Sea of Japan, western Japan, Zootaxa 5023 (1), pp. 1-43 : 11

Genus Thyone Oken, 1815 *

[New Japanese name: Kehada-namako-zoku]

* Note. Names established in Oken (1815 –1816), including Thyone , were once ruled to be unavailable because the works did not strictly adapt the Principle of Binominal Nomenclature (International Commission on Zoological Nomenclature [ICZN] 1956). However, recently, Paulay and O’Loughlin’s (2012) Case 3598, in which Thyone Oken, 1815 is treated as an available and valid name within the Dendrochirotida has been accepted by ICZN (2015). Jaeger (1833) made the dendrochirotid Thyone available; however, Lesson (1830) had earlier erected an aspidochirotid holothurian genus with the same name: i.e., the aspidochirotid Thyone Lesson, 1830 , which had precedence over the dendrochirotid Thyone Jaeger, 1833 . Despite the above ICZN ruling, however, Thyone has been in prevailing usage in the sense of Dendrochirotida , rather than Aspidochirotida. This prompted Paulay and O’Loughlin (2012) to ask the ICZN to make Thyone Oken, 1815 available under its plenary power.