Click the thumbnail photos to enhance!
Favorinus sp. 04 might be a strange colour form, which differs by white tips of the cerata and lacks the minute white spots on the cerata.
To my knowledge are these the only picture of this species, it is not in IPN nor at the internet!
Note added on 3 March 2012:
There are pictures of the variant without white spots on the cerata from Nabucco Island, Indonesia, as Favorinus sp. 04, and at NUDIPIXEL also from Anilao, Philippines.
How to cite:
Köhler, E. (2016), published 27 September 2016, Favorinus sp. 02 Genus: M.E. Gray, 1850
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Favorinus_sp_02.htm