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Pretty similar are:
Goniobranchus cf. albopustulosus which is a 9 mm juvenile specimen, and differs by the colour of the gills: red-brown with white spots or edges, and by the submarginal violet spots. It is most possibly an undescribed species of Goniobranchus or Chromodoris.
Chromodoris vibrata which has a yellow mantle with white pustules and violet patches at the mantle margin. It differs by the gills and rhinophores, both of them are white and dark purple tipped.
It was originally posted at these websites as Chromodoris albopustulosa (Pease, 1860) [Doris],
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
and move Chromodoris albopustulosa to the reerected ("rescued from synonymy") genus Goniobranchus Pease, 1866.
More information on Goniobranchus albopustulosus as Chromodoris albopustulosa are on Bill Rudman's Sea-Slug Forum!