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Tenellia sp. 11  Genus: A. Costa, 1866

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Tenellia sp. 11 has a translucent orange body with a diffuse blueish region between the first pair of cerata and the rhinophores and another diffuse blueish region between the oral tentacles. The smooth rhinophores are basal translucent, the upper third is translucent orange. The cerata are translucent orange with a diffuse purple region in the upper third, followed by a white subapical ring. The oral tentacles are basal translucent blueish, merging into white, the outer half is translucent orange. This animal lacks its posterior half behind the sencond pair of cerata.
It is only known from this picture of a 3 mm specimen, the total length icluding the lacking part might have been 6 - 9 mm.
This specimen was identified by Dr. Richard Willan, thanks!
This species was posted on 9 July 2011 at these websites as Trinchesia sp. K  Genus: von Ihering, 1879, and changed on 15 July 2011 into
Trinchesia sp. 11  Genus: von Ihering, 1879.
For some genera, such as Trinchesia was the alphabet almost through. I had to change the distinguishing alphabetic character into a number. I had chosen 2-digit numbers, even though '01' looks a little bit stupid, and now is only the genus italic written.
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 28 December 2016 Trinchesia sp. 11  Genus: von Ihering, 1879 to the Genus Tenellia  A. Costa, 1866.
References:
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. (2016), published 28 December 2016, Tenellia sp. 11  Genus: A. Costa, 1866
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Tenellia_sp_11.htm