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Pretty similar is Flabellina sp. 01, which differs by the papillate rhinophores.
This species was posted on 25 May 2003 at these websites as Cuthona sibogae (Bergh, 1905), I followed Miller (2005) and placed it on 7 December 2010 in the genus Trinchesia von Ihering, 1879.
Cella et al. (2016) moved it to the Genus Tenellia A. Costa, 1866 in the Family Fionidae J.E. Gray, 1857.
Miller, M.C. 2005. An appraisal of the identity of the New Zealand species of the aeolid nudibranch family Tergipedidae (Gastropoda: Opisthobranchia). Journal of Natural History 38: 1183-1192.
Kristen Cella, Leila Carmona, Irina Ekimova, Anton Chichvarkhin, Dimitry Schepetov & Terrence M. Gosliner (2016)
A Radical Solution: The Phylogeny of the Nudibranch Family Fionidae.
PLoS ONE 11(12): e0167800. doi:10.137 1/journal .pone.0167800
The above publication is completely online, open access, CC-license
More information on Tenellia sibogae as Cuthona sibogae are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2016), published 20 December 2016, Tenellia sibogae (Bergh, 1905)
available from http://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Tenellia_sibogae.htm