Dermatobranchus sp. 12  Genus: van Hasselt, 1824

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This is an undescribed species of the genus Dermatobranchus. I call it Dermatobranchus sp. 12, to distinguish it from other species of Dermatobranchus.
It can be distinguished from other arminaceans by the network of the brownish-orange longitudinal lines. There is an arch-shaped diffuse brownish patch on the mantle in the anterior third. The mantle margin has a pink tinge with brownish-orange spots. There are flat rounded tubercles on the translucent whitish mantle. The margin of the white oral veil is orange, there is a thin orange submarginal line in this specimen. The rhinophore clubs are black with white edges.
Pretty similar are:
Dermatobranchus albus which differs by longitudinal low white ridges with a yellow crest and translucent grey grooves, and by the rhinophores which have yellow/orange tips, and lacks the flat rounded tubercles,
Dermatobranchus sp. 13 which lacks the network of brownish-orange longitudinal lines, and has a soplid white oral veil,
Dermatobranchus sp. 14 which differs by series of minute brownish spots on the longitudinal ridges,
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.
How to cite:
Köhler, E. (2016), published 20 September 2016, Dermatobranchus sp. 12  Genus: van Hasselt, 1824
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Dermatobranchus_sp_12.htm