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Gymnodoris citrina (Bergh, 1875) [Trevelyana]

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The genus Gymnodoris is an interesting genus of carnivorous nudibranchs which feed on other sea slugs. 
Gymnodoris citrina is characterized by small yellow-orange spots on the mantle and yellow-orange rhinophores and gills. The gills form a complete circle around the anus.There is a distinctive row of orange tubercles at the anterior margin of the head. The anterior end of the foot ends in two lobed sensory folds.
Pretty similar are:
Gymnodoris sp. 06 which differs by the gills, which are arranged in an arch, forming an incomplete circle, and by the paddle shaped posterior end of the foot
Gymnodoris sp. 08 which differs by the 5 simple gills, and by the translucent white rhinophores with orange tips
More information on Gymnodoris citrina are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 27 May 2017, Gymnodoris citrina (Bergh, 1875)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Gymnodoris_aurita.htm