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Goniobranchus kuniei (Pruvot-Fol, 1930) [Chromodoris]

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The sea slug Goniobranchus kuniei is one of a group of similarly coloured species which Bill Rudman calls the "Risbecia tryoni colour group". They all have large purple or purple-brown spots or marks, usually ringed with white, an often reticulate brownish background, and a purple border:
Chromodoris geminus which has four colour bands around the mantle edge: an outermost white, then translucent greyish purple, then white, then yellow. It has a wide mantle overlap.
Goniobranchus leopardus which has leopard-like multiple spots, or marks, forming a hollow squarea, distinct purple line at the border of the mantle and a wide mantle overlap.
Hypselodoris tryoni which has high shape of the body with a reduced mantle overlap.
This picture shows the characteristic mantle waving behaviour of this species, in which all the mantle edge is raised and lowered together.
It was posted on 25 Apr. 2003 at these websites as Chromodoris kuniei  Pruvot-Fol, 1930,
I follow the recent article (published: 10 April 2012)
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
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0033479
and move Chromodoris kuniei to the reerected ("rescued from synonymy") genus Goniobranchus  Pease, 1866.
More information on Goniobranchus kuniei as Chromodoris kuniei are on Bill Rudman's Sea-Slug Forum!