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Tenellia sp. 41  Genus: A. Costa, 1866

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Tenellia sp. 41 is characterized by its translucent bluish-pink body, and by the white patch in front of the large simple rhinophores, which are basal translucent with diffuse whitish spots/rings and a dark bluish-purple apex. It has relatively small oral tentacles which are basal translucent, followed by a bright bluish region, the apex is dark bluish-purple. The cerata are arranged in transverse rows, basal diffuse grey-green, subapical is a thin black ring, followed by a bluish-white band, the apex is bright pink.
Richard Willan writes on this species: "Evidently from your photos it has large simple rhinophores, relatively small oral tentacles, a rounded foot border, and cerata in transverse rows. All these features point to it being one of the large Trinchesia (formerly called Cuthona) species in the family Tergipedidae."
This species was posted on 31 May 2011 at these websites as Cuthona sp. D  Genus: Alder & Hancock, 1842, on 14 June 2011 changed into
Trinchesia sp. D  Genus: von Ihering, 1879, and on 15 July 2011 changed into Trinchesia sp. 04  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 11 January 2017 Trinchesia sp. 04  Genus: von Ihering, 1879 as #41 to the Genus Tenellia  A. Costa, 1866.
References:
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 11 January 2017, Tenellia sp. 41  Genus: A. Costa, 1866
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Tenellia_sp_41.htm