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It can be distinguished from other arminaceans by the solid white oral veil. There is an arch-shaped diffuse brownish patch on the mantle in the anterior third. The rhinophore clubs are dark grey merging to brown in the outer fourth with white edges, and white apices.
Pretty similar are:
Dermatobranchus albus which differs by an orange margin of the oral veil,
Dermatobranchus semilunus which differs by dark irregular spots on the oral veil, and by longitudinal ridges and the depressions between the dorsal ridges light grey with dark dots,
Dermatobranchus fasciatus which differs by dark irregular spots on the oral veil which has a pink margin,
Dermatobranchus sp. 12 which differs by a network of brownish-orange longitudinal lines, and by an orange margin of the oral veil.
How to cite:
Köhler, E. (2016), published 24 March 2016, Dermatobranchus sp. 13 Genus: van Hasselt, 1824
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Dermatobranchus_sp_13.htm