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This juvenile specimen was identified by Dr. Richard C.Willan.
Very similar are
Dendrodoris nigra which can externally be distiguished by the shape of the body when crawling: Dendrodoris nigra is more elongate. Another feature is the position and nature of the gills: In Dendrodoris nigra the gills are relatively numerous and form a compact circle around the anus at the extreme posterior end of the dorsum.
Dendrodoris arborescens which has a black body without white spots and a marginal orange/red band.
This species was published on 19 May 2004 on these websites as Dendrodoris fumata (Rüppell & Leuckart, 1828) [Doris],
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 fumata appears on page/Seite 29 and on plate/Tafel VIII,
that is the year must be 1830.
I changed it on 11 January 2016 into Dendrodoris fumata (Rüppell & Leuckart, 1830) [Doris].
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): 29, plate VIII, Figure 2
available online at http://www.biodiversitylibrary.org/item/114235#page/349/mode/1up.
More information on Dendrodoris fumata are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 15 March 2017, Dendrodoris fumata (Rüppell & Leuckart, 1830)
available from http://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Dendrodoris_fumata.htm