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Mexichromis similaris (Rudman, 1986) [Durvilledoris]

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The mantle of Mexichromis similaris is translucent pinkish purple with a white mantle margin. On the inside edge of the white margin there are diffuse purple patches. There is a median white line which forms a ring around the gill pocket. The upper half of the rhinophores and gills is translucent red/orange, the lower half is pale.
There are many similar coloured chromodorids which Bill Rudman calls the "Noumea purpurea colour group".
Pretty similar are:
Verconia norba, which has also a white band around the gill pocket but a pale pink mantle,
Verconia varians, which has no white patch or band around the gill pocket, and differs by the pink or orange background colour,
Verconia alboannulata which has an opaque white band in the midline which splits just behind the rhinophores to form an elongate oval which encircles the gill pocket and
Mexichromis pusilla which has an pale pink mantle with an elongate white streak in the midline between the rhinophores and another in front of the gills, but not around the gill pocket.
It was posted on 30 January 2005 at these websites as Durvilledoris similaris  Rudman, 1986,
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 Durvilledoris similaris to the genus Mexichromis  Bertsch, 1977.
More information on Mexichromis similaris as Durvilledoris similaris are on Bill Rudman's Sea-Slug Forum!