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Marionia rubra (Rüppell & Leuckart, 1828) [Tritonia]

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Marionia rubra is characterized by its reddish-brown body colour, and by numerous bushy gills down each side of the body.
Let me quote the description in IPN at page 337: "Color variable from deep red to light green or brown. Notum covered with large, crowded tubercles that often are covered with opaque white pigment. There are 8-12 short velar appendages that have multifid tips. Margins of the rhinophoral sheaths are broad and undulating."
Reference:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426 pp.
This is a picture of the original painting, plate/Tafel IV, Fig. 1. Tritonia rubra. Rüppell & Leuckart, 1828.
Let me quote Bill Rudman:"This group of tritoniids needs more work. At the moment it is hard to say how many species there are in the tropical Indo-West Pacific. It is possible that species vary in colour depending on the colour of the soft-corals they are feeding on but basically we don't know."
The pictures #7 and #8 were posted on 26 June 2003 at these websites as Marionia sp. B Genus: Vayssière, 1877,
on 14 October 2011 changed into Marionia sp. 02 Genus: Vayssière, 1877, and on 13 June 2016 identified as a color form of Marionia rubra (Rüppell & Leuckart, 1828).
More information on Marionia rubra are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2016), published 13 June 2016, Marionia rubra (Rüppell & Leuckart, 1828)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Marionia_rubra.htm