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Ceratosoma sp. 01  Genus: J.E. Gray in M.E. Gray, 1850

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This is an undescribed species of the genus Ceratosoma, I label it Ceratosoma sp. 01 to distinguish it from other species of Ceratosoma.
Ceratosoma sp. 01 is characterized by its translucent pinkish to translucent blueish-grey body colour, by a broad whitish-cream mantle margin, and by a white patch or white and yellowish lines in the center of the notum. The rhinophores and gills are translucent-grey. This species is smaller (up to 12 mm) and less lobate than other species of Ceratosoma. Let me quote www.seaslugsofhawaii.com:
"Although this species is unlike most Ceratosoma spp in size and form, Terry Gosliner (pers. com) reports that both DNA and morphology support placing it in the genus."
It is Ceratosoma sp. 2 in IPN at page 276:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp.
There are many pictures of it from Japan on www.umiushi-zukan.com, and from Hawaii on www.seaslugsofhawaii.com, on NUDIPIXEL are pictures of it from Watamu, Kenya, Ambon, Indonesia, Long Dong, Taiwan, Koh Phi Phi, Thailand, and from Puerto Galera, Philippines.
How to cite:
Köhler, E. (2017), published 16 February 2017, Ceratosoma sp. 01  Genus: J.E. Gray in M.E. Gray, 1850
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Ceratosoma_sp_01.htm