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The species of the genus Gymnodoris are carnivorous nudibranchs which feed on other sea slugs.
Pretty similar is:
Gymnodoris ceylonica which differs by red spots, by translucent white rhinophores with orange tips, and by simple gills, which are branched in Gymnodoris impudica.
This species was published on 15 June 2003 at these websites as Gymnodoris rubropapulosa (Bergh, 1905) [Trevelyana],
It was identified with its older name Gymnodoris impudica (Rüppell & Leuckart, 1828) by Yonow (2008), confirmed by Yonow (2011).
I know since a few days that Rüppell & Leuckart (1828 - 1830) is online, see reference. This text was published in 2 parts,
the pages 1 - 22 in 1828, and the pages 23 - 47 in 1830. Doris impudica appears on page/Seite 33 and on plate/Tafel X,
that is the year must be 1830.
I changed it on 9 January 2016 into Gymnodoris impudica (Rüppell & Leuckart, 1830) [Doris].
Yonow, N., 2008. Sea Slugs of the Red Sea. - Pensoft Publishers, Sofia - Moscow. 304 pp.
Yonow N. (2011) Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 15. The suborder Doridina (Mollusca, Gastropoda, Opisthobranchia, Nudibranchia).
Zoologische Mededelingen 85(17): 905-956. , available online at http://dpc.uba.uva.nl/cgi/t/text/get-pdf?idno=m8504a17;c=zoomed
Rüppell E. & Leuckart F.S. (1828-1830). Mollusca [in] Atlas zu der Reise im nördlichen Afrika von Eduard Rüppell. 1. Abth. Zoologie. 5. Neue wirbellose Thiere des Rothen Meers.
Frankfurt, H.L. Brönner pp. 1-22, pl. 1-12 , pp. 23-47 [probably 1830], page(s): 33, plate X, Figures 2a - 2c
available online at http://www.biodiversitylibrary.org/item/114235#page/349/mode/1up
More information on Gymnodoris impudica as Gymnodoris rubropapulosa are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2020), published 19 May 2020, Gymnodoris impudica (Rüppell & Leuckart, 1830)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Gymnodoris_impudica.htm