Plakobranchus cf. papua  Meyers-Muñoz & van der Velde, 2016

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cf. is an abbreviation from a Latin word (confer) and means 'refer to' or 'compare with', here it means it could possibly be Plakobranchus papua or perhaps something closely related, or at least similar in appearance.
Plakobranchus papua is characterized by an "intense ochre body with white spots scattered all over the dorsum, head, and flanks: closest to the head region, on the anterior side corresponding to 1/4 of the body length, the spots are largest, on 2/4 and 4/4 of the body length the dots are smaller, and on the 3/4 of the body length they are larger, but not as large as on the anterior part of the body. Spots are pale white with a thin yellow outline and with areas with opaque white pigment." Meyers-Muñoz et al. (2016)
The long rolled rhinophores are black with purplish outer tips.The pedal tentacles are translucent white. The foot sole is white with a black tail.
Plakobranchus cf. papua differs from Plakobranchus papua by the colour of the rhinophores which are basally whitish, the outer half black/dark blue and with lighter tips, and by the blue colour of the foot and the 'tail'.
The co-author Bert W. Hoeksema wrote on this specimen (pers. comment):
"This is an undescribed species. We also found it in Papua but we did not include it in our paper. I found one near Cebu The blue foot sole is typical."
The specimen #5 was misidentified and posted on 24 July 2012 at these websites as Plakobranchus ocellatus van Hasselt, 1824, just as
specimen #6 which was posted on 20 October 2012.
Meyers-Muñoz MA, van der Velde G, van der Meij SET, Stoffels BEMW, van Alen T, Tuti Y, Hoeksema BW (2016) The phylogenetic position of a new species of Plakobranchus from West Papua, Indonesia (Mollusca, Opisthobranchia, Sacoglossa).
ZooKeys 594: 73-98. doi: 10.3897/zookeys.594.5954
How to cite:
Köhler, E. (2017), published 29 November 2017, Plakobranchus cf. papua  Meyers-Muñoz & van der Velde, 2016
available from https://www.Philippine-Sea-Slugs.com/Sacoglossa/Plakobranchus_papua_cf.htm