Eubranchus ocellatus (Alder & Hancock, 1864) [Eolis]

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Eubranchus ocellatus is characterized by its translucent body and cerata with scattered brown spots all over the body, rhinophores and oral tentacles, often aggregated into bands and patches. The rhinophores are smooth. The cerata can change shape considerably, and at their largest are greatly inflated, the basal two-thirds being cylindrical and the upper third tapering to a point. A ring of 7 - 8 tubercles form a ring around the ceras at about a third the way from the tip. The tip of each ceras is reddish pink, below which can be a white ring and a yellowish band. The digestive gland duct in each ceras is a thin tube, usually brown in colour.
Very similar are:
Eubranchus rubropunctatus which differs by papillae scattered over the rhinophores,
Eubranchus cf. mandapamensis which differs by the annulate rhinophores, and
Eubranchus mandapamensis which differs by the spaced annulations on the rhinophores.
Eubranchus sp. 14 is most probably also Eubranchus ocellatus (Alder & Hancock, 1864) [Eolis].
This species was posted on 26 May 2014 at these websites as Dunga ocellata (Alder & Hancock, 1864) [Eolis], I followed the Sea-Slug Forum, which uses this name, though Miller (1971: 326) synonymised Dunga under Eubranchus. I noticed on 1 November 2016 that WoRMS lists Dunga Eliot, 1902 as a synonym of Eubranchus Forbes, 1838, but gives no reference. I asked Dr. Richard C. Willan, and changed it on 24 November 2016 into
Eubranchus ocellatus (Alder & Hancock, 1864) [Eolis].
Miller, M.C. 1971. Aeolid nudibranchs (Gastropoda: Opisthobranchia) of the families Flabellinidae and Eubranchidae from New Zealand waters.
Zoological Journal of the Linnean Society 50(4): 311-337.
Gofas, S.; Caballer, M.; Rosenberg, G. (2015). Dunga Eliot, 1902. In: MolluscaBase (2015). Accessed through: World Register of Marine Species
at http://www.marinespecies.org/aphia.php?p=taxdetails&id=599566 on 2016-11-01
More information on Eubranchus ocellatus as Dunga ocellata are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2019), published 26 March 2019, Eubranchus ocellatus (Alder & Hancock, 1864)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Eubranchus_ocellatus.htm


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