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This species comes in an amazing array of patterns and variations, the above variants from the Philippines are as Chromodoris sp. 10 in IPN page 214, many of these variations are shown by NUDIPIXEL, and by the Sea-Slug Forum. There are 54 spictures from Japan (the type localty) at umiushi-zukan, and a picture of the holotype at the OKINAWA SLUG SITE.
I think those specimens with transverse yellow patches, on these websites as Goniobranchus sp. 06 Genus: Pease, 1866, are a distinct species because there is only one somehow intermediate variant from from Perth, Western Australia online, they are as Chromodoris sp. 11 in IPN, page 214.
This species was posted on 14 July 2007 at these websites as Chromodoris roboi Gosliner & Behrens, 1998,
Johnson & Gosliner (2012) moved Chromodoris roboi to the reerected ("rescued from synonymy") genus Goniobranchus Pease, 1866.
I changed it on 4 May 2012 into Goniobranchus roboi (Gosliner & Behrens, 1998) [Chromodoris].
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp.
Rebecca Fay Johnson & Terrence M. Gosliner. 2012.
Traditional Taxonomic Groupings Mask Evolutionary History:
A Molecular Phylogeny and New Classification of the Chromodorid Nudibranchs. online at
More information on Goniobranchus roboi as Chromodoris roboi are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2016), published 17 March 2016, Goniobranchus roboi (Gosliner & Behrens, 1998)
available from http://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Goniobranchus_roboi.htm