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Thecacera sp. 03  Genus: Fleming, 1828

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Thecacera sp. 03 is characterized by its translucent dark grey/black background colour. The extrabranchial and extrarhinophoral processes are basally of the same colour as the body, merging in the outer part into bright orange, the apices are opaque white. The rhinophores are of the same colour as the body, but darker, also with orange subapical and white tips. The gills are also translucent dark grey/black
This species might be a melanistic variant of Thecacera picta  Baba, 1972, but it is possibly as Thecacera sp. 6 in Gosliner et al. (2015), page 120, which lacks the orange pigment at the tips of the appendages and rhinophores, or as Thecacera sp. 11 also page 120, which differs by a deep maroon purple colour. To make things more complicated: There are pictures of a very similar species from Bali, Indonesia online which differ by numerous black spots of varying sizes at the sides of the body.
Reference:
Gosliner, T.M, D.W. Behrens & Á.Valdés. 2015. Nudibranch & Sea Slug Identification Indo-Pacific.
New World Publications Inc. Jacksonville, FL. 408 pp.
How to cite:
Köhler, E. (2020), published 26 July 2020, Thecacera sp. 03  Genus: Fleming, 1828
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Thecacera_sp_03.htm

 
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