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In this specimen are the rhinophores not very bulbous, but it looks very similar to the specimen in IPN at page 308, except of the rhinophores:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426 pp.
This species was posted on 30 August 2003 on these websites as Dermatobranchus sp. B.
Pretty similar is Dermatobranchus tuberculatus, which has also an irregular body surface, and differs by the tan mantle, by the flat rounded tubercles, and by the rhinophores.
How to cite:
Köhler, E. (2017), published 13 August 2017, Dermatobranchus pustulosus van Hasselt, 1824
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Dermatobranchus_pustulosus.htm