Tenellia sp. 31  Genus: von Ihering, 1879

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Tenellia sp. 31 has a translucent whitish body, and short smooth rhinophores which are translucent whitish with some minute opaque white spots. The oral tentacles are also translucent whitish. The cerata are mottled cream-white.
The second picture is cropped of the original to show more details.
Here is the comment of David W. Behrens on these 2 specimens: "Not sure. Either a Cuthona or a Tergipes n.sp." , so I should use the family name and call it Tergipedidae sp. family: Bergh, 1889..., comment on 7 January 2017: this family was synonymised by Cella et al. (2016) with Fionidae  J.E. Gray, 1857.
I wait until somebody reviews the family worldwide and keep it as Trinchesia sp. 31  Genus: von Ihering, 1879 until the dust settles.
This species was posted on 3 October 2012 at these websites as Trinchesia sp. 31  Genus: von Ihering, 1879.
Cella et al. (2016) restricted the genus Cuthona  Alder & Hancock, 1855 to the type species, C. nana (Alder & Hancock, 1842) just like Miller (2004) did, and synonymised the genera
- Catriona  Winckworth, 1941,
- Phestilla  Bergh, 1874,
- Cuthona  Alder & Hancock, 1855 (partim), and
- Trinchesia  Ihering, 1879
with Tenellia  A. Costa, 1866 in the Family Fionidae  J.E. Gray, 1857.
I moved on 7 January 2017 Trinchesia sp. 31  Genus: von Ihering, 1879 to the Genus Tenellia  A. Costa, 1866.
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs.
Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp.
Miller, M.C. 2004. 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
How to cite:
Köhler, E. (2017), published 7 January 2017, Tenellia sp. 31  Genus: A. Costa, 1866
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Tenellia_sp_31.htm