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Trinchesia sp. 22  Genus: A. Costa, 1866

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Trinchesia sp. 22 is characterized by its transparent foot which has brownish-orange pigment at the posterior end, and by the opaque white body. The slightly annulate rhinophores are brown with a diffuse whitish medial band. The oral tentacles are orange with white spots, and white apices. The ceratal wall is transparent covered with minute opaque white spots merging into an opage white subapical region, the apices are translucent, distinctive is the brown highly branched ceratal core.
This specimen was identified by David W. Behrens, he wrote: "Cuthona sp. new", thanks!
To my knowledge are these the only pictures of this species, it is not in IPN nor at the internet!
This species was posted on 13 September 2011 at these websites as Trinchesia sp. 22  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 2 January 2017 Trinchesia sp. 22  Genus: von Ihering, 1879 into the genus Tenellia  A. Costa, 1866.
Korshunova et al. (2017) restricted the genus Tenellia  A. Costa, 1866 to this 3 species:
-Tenellia adspersa (Nordmann, 1845)
-Tenellia chaetopterana Ekimova, Deart & Schepetov, 2017 and
-Tenellia fuscata (Gould, 1870)
and reinstated the family Trinchesiidae  F. Nordsieck, 1972 with the genera
-Catriona  Winckworth, 1941
-Diaphoreolis  Iredale & O'Donoghue, 1923
-Phestilla  Bergh, 1874
-Rubramoena  Cella, Carmona, Ekimova, Chichvarkhin, Schepetov & Gosliner, 2016
-Tenellia  A. Costa, 1866
-Trinchesia  von Ihering, 1879 and
-Zelentia  Korshunova, Martynov & Picton, 2017
and moved it again into the genus Trinchesia  von Ihering, 1879.
I changed it back on 1 November 2017 into Trinchesia sp. 22  Genus: von Ihering, 1879.
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
Korshunova, T.; Martynov, A.; Picton, B. (2017). Ontogeny as an important part of integrative taxonomy in tergipedid aeolidaceans (Gastropoda: Nudibranchia) with a description of a new genus and species from the Barents Sea.
Zootaxa. 4324(1): 1., available online at https://doi.org/10.11646/zootaxa.4324.1.1
How to cite:
Köhler, E. (2017), published 1 November 2017, Trinchesia sp. 22  Genus: von Ihering, 1879
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Trinchesia_sp_22.htm