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Elysia cf. marginata can be distinguished by very fleshy parapodia whereas Elysia marginata has thin parapodias. The parapodias form 3 siphons, the black parapodial margin and a submarginal yellow or orange band are interrupted between the siphons.
This species is as Elysia sp. 2 in IPN on page 80,
it was posted on 3 June 2003 at these websites as Elysia cf. ornata (Swainson, 1840) [Thallepus], Krug et al. (2016)
restricted Elysia ornata to Atlantic waters and showed that there may be undescribed Indo-Pacific species, all members of the Elysia ornata clade.
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp.
Krug P.J., Vendetti J.E. & Valdés Á. (2016). Molecular and morphological systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region.
Zootaxa. 4148(1): 1-137., available online at https://doi.org/10.11646/zootaxa.4148.1.1
More information on Elysia cf. marginata as Elysia sp. 11 are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 7 July 2017, Elysia cf. marginata (Pease, 1871)
available from http://www.Philippine-Sea-Slugs.com/Sacoglossa/Elysia_marginata_cf.htm