Trapania japonica (Baba, 1935) [Drepania]

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Trapania japonica is characterized by the colour pattern of dark brown spots on the whitish body, and yellow lateral processes.
Thanks for identification to Dr. Juan Lucas Cervera Currado
This species was at Nudi Pixel as Trapania sp. from Koh Rong, Cambodia, identification verified by Richard Willan, and as Trapania japonica from Anilao, identification not verified. The website NUDIPIXEL is down, the pictures are gone.
David W. Behrens is at The Slug Site discussing the 'Opisthobranch of the Week # 762", with a picture of a similar species taken by Tet Lara at Anilao, and labels it also Trapania sp., but no word on Trapania japonica. Which is as well not included in Gosliner et al. (2015).
Trapania sp. 05 is possibly a strange colour variant of Trapania japonica, with large brown patches,
the other extreme variant almost lacking the brown spots is as Trapania sp. 8 at www.umiushi-zukan.com.
There is either one very variable species or a complex of pretty similar species, with a white body colour, yellow pigment on the processes and dark brown pigment on the anterior face of the translucent whitish gills.
Pretty similar are also:
Trapania sp. 08, which lacks the brown spots on the mantle, and differs by translucent white gills.
Trapania naeva, which differs by dark brown/black lateral processes.
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 Trapania japonica are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2021), published 30 January 2021, Trapania japonica (Baba, 1935)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Trapania_japonica.htm


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