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Tylodina sp. 01  Genus: Rafinesque, 1814

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Tylodina sp. 01 was found on a grey/blueish sponge rather deep (40 m plus). The Eastern Pacific Tylodina fungina  Gabb, 1865 is often associated with the yellow sulphur sponge Aplysina fistularis, its food source. The Mediterranean Tylodina perversa (Gmelin, 1791) is also almost always on the food source Verongia aerophoba, common name also sulphur sponge.
This species is as Tylodina sp. 2 in Gosliner et al. (2015), let me quote: "Size: 20 mm, ID: Body yellow; cap-shaped shell with brown radiating bands near the margins; rhinophores and oral tentacles yellow, elongate. Rocky reefs on yellow or brownish sponges." There is prominent radial ribbing on the shell, similar to some specimens of the Australian species Tylodina corticalis (Tate, 1889).
Reference:
Gosliner, T.M, D.W. Behrens & Á.Valdés. 2015. Nudibranch & Sea Slug Identification Indo-Pacific.
New World Publications Inc. Jacksonville, FL. 408 pp.
More information on species of Tylodina are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2016), published 5 June 2016, Tylodina sp. 01  Genus: Rafinesque, 1814
available from http://www.Philippine-Sea-Slugs.com/Umbraculoidea/Tylodina_sp_01.htm