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Tenellia sp. 27  Genus: A. Costa, 1866

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Tenellia sp. 27 is characterized by its bright orange-red body and by the purple cerata which have small yellowish spots and white tips. The oral tentacles are opaque white. The smooth rhinophores are translucent orange-red in the basal half, merging into opaque white in the outer half.
It is most likely a colour variant of Cuthona sp. 17 in IPN at page 365.
Pretty similar is Tenellia sp. 32 which has also an orange appearance and white oral tentacles, but differs by the cerata which are diffuse yellowish-grey with purple apices and opaque white cnidosacs.
This species was posted on 11 March 2012 at these websites as Trinchesia sp. 27  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 6 January 2017 Trinchesia sp. 27  Genus: von Ihering, 1879 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 6 January 2017, Tenellia sp. 27  Genus: A. Costa, 1866
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Tenellia_sp_27.htm