Dermatobranchus oculus Gosliner & Fahey, 2011

Description

Body 7–8 mm long, elongate, narrowing posteriorly. The dorsum bears a series of longitudinal ridges. The oral veil extends forward with blunt extensions at the corners. Widely spaced rhinophores sit behind the oral veil with longitudinal lamellae on the rounded club; the stalk does not narrow noticeably.
Ground colour of the dorsum and foot is opaque white. The depressions between the dorsal ridges are light grey. There are dark-centred ocellated spots on the dorsum surrounded by pink pigment. Rhinophore stalks are white and the clubs are black. The oral veil is opaque white with a light grey border.

Distribution

Known only from Okinawa, Japan (type locality: Tengan Pier, Ishikawa City, Okinawa, Ryukyu Islands, 13 m).

Etymology

Verbatim from the original description (Gosliner & Fahey, 2011, p.319):

The specific name oculus is from the Latin word meaning 'eye' or 'bud' referring to the evenly spaced oscillated spots on the dorsum.

(The paper prints "oscillated"; the intended meaning is "ocellated".)

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References

• Dermatobranchus sp. (Okinawa), Coleman N. (2001). 1001 Nudibranchs: Catalogue of Indo-Pacific Sea Slugs. Neville Coleman's Underwater Geographic Pty Ltd, Springwood, Australia. 144 pp.
• Dermatobranchus sp. (Okinawa), Coleman N. (2008). Nudibranchs Encyclopedia: Catalogue of Asia/Indo-Pacific Sea Slugs. Neville Coleman's Underwater Geographic Pty Ltd, Springwood, Australia. 416 pp.
• Dermatobranchus sp. 8, Gosliner T.M., Behrens D.W. & Valdés Á. (2008). Indo-Pacific Nudibranchs and Sea Slugs: A field guide to the world's most diverse fauna. Sea Challengers Natural History Books, 426 pp.
• Dermatobranchus oculus sp. nov., GOSLINER T.M. & FAHEY S.J. (2011). Previously undocumented diversity and abundance of cryptic species: a phylogenetic analysis of Indo-Pacific Arminidae Rafinesque, 1814 (Mollusca: Nudibranchia) with descriptions of 20 new species of Dermatobranchus. Zoological Journal of the Linnean Society. 161(2): 245-356. https://doi.org/10.1111/j.1096-3642.2010.00649.x
• Dermatobranchus oculus, Terrence Gosliner, Ángel Valdés and David Behrens. (2015). Nudibranch and Sea Slug Identification Indo-Pacific. New World Pubns Inc.
• ジャノメオトメウミウシ（新称）, 中野理枝. (2018). 日本のウミウシ. 文一総合出版.