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It is probably as Elysia sp. 10 in IPN at page 83
Maybe it is the same species as Elysia sp. 14, which does not stretch its parapodia.
This species was posted on 28 February 2011 at these websites as Elysia sp. C Genus: Risso, 1818, and changed on 22 July 2011
into Elysia sp. 03 Genus: Risso, 1818.
Pretty similar is Elysia sp. 26, which differs by long smooth rhinophores.
For some genera, such as Trinchesia is the alphabet almost through. I had to change the distinguishing alphabetic character into a number. I have chosen 2-digit numbers, even though '01' looks a little bit stupid, and now is only the genus italic written.
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs.
Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp. at page 83
How to cite:
Köhler, E. (2017), published 24 July 2017, Elysia sp. 03 Genus: Risso, 1818
available from https://www.Philippine-Sea-Slugs.com/Sacoglossa/Elysia_sp_03.htm