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There are many similar coloured chromodorids which Bill Rudman calls the "Noumea purpurea colour group".
Pretty similar are:
Mexichromis pusilla which differs by the varying width of the cream band at the mantle margin, besides the two white streaks in the midline is it very thin, between the gills and the rhinophores is it very broad, giving the appearance of a waist
Verconia norba, which differs by the white band or white patch around the gill pocket,
Mexichromis similaris which differs by the translucent pinkish purple mantle and by 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 translucent pinkish purple, and
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.
This species was posted on 24 October 2011 on these websites as Noumea varians (Pease, 1871) [Chromodoris]
The discovery by Rüdiger Bieler that the generic name Noumea was first introduced by Fauvel (1874) for a beetle means that the subsequent introduction by Risbec (1928) for a nudibranch is invalid. Therefore the next available generic name has to be used for the genus of nudibranchs, and that
is Verconia Pruvot-Fol, 1931.
Bieler, R.; Bouchet, P.; Caballer, M. (2015). Verconia Pruvot-Fol, 1931. In: MolluscaBase (2015). Accessed through:
World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533937 on 2016-02-02.
More information on Verconia varians as Noumea varians are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2021), published 10 February 2021, Verconia varians (Pease, 1871)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Verconia_varians.htm