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Pretty similar are Philinopsis pilsbryi which has no blue markings and Philinopsis cf. reticulata which has very little blue markings at the postorior end of the parapodia. Its body colour is whitish with a brown reticulate pattern. Species of Philinopsis are usually found burrowing through sand or mud.
More information on Philinopsis reticulata are on Bill Rudman's Sea Slug Forum!
How to cite:
Köhler, E. (2016), published 3 July 2016, Philinopsis reticulata (Eliot, 1903)
available from http://www.Philippine-Sea-Slugs.com/Cephalaspidea/Philinopsis_reticulata.htm