formerly placed in the Order: NUDIBRANCHIA, in the Subclass: OPISTHOBRANCHIA

There is still a lot of confusion on the taxonomic placement: 
The Sea-Slug Forum places it in the genus Hoplodoris, which the Sea-Slug Forum places in the family Dorididae. 
Fahey, S. J. & Gosliner, T. M. (2003) Mistaken identities: On the Discodorididae genera Hoplodoris Bergh, 1880 and Carminodoris Bergh, 1889 (Opisthobranchia, Nudibranchia). 
Proceedings of the California Academy of Sciences, 54(10): 169-208. 
online at PUBLICATIONS OF THE PEET PROJECT synonymised Carminodoris with Hoplodoris, 
I quote the abstract:  "Analyses indicate that the genus Carminodoris Bergh, 1889 is a junior synonym of Hoplodoris Bergh, 1880."
Dayrat, B., & T. M. Gosliner. 2005. Species names and metaphyly: a case study in Discodorididae (Mollusca, Gastropoda, Euthyneura, Nudibranchia, Doridina). Zoologica Scripta 34(2):199-224. 
I quote the abstract: " Therefore, instead of reallocating some Carminodoris species to Hoplodoris, it is actually some Hoplodoris species that need to be transferred to Carminodoris." 
WoRMS - World Register of Marine Species places it in the genus Hoplodoris. 
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. 
Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp. uses Carminodoris at page 168 
NUDIPIXEL uses Hoplodoris. 
I follow Gosliner, et al, 2008 and place it in the genus Carminodoris in the family Discodorididae. 
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