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Trinchesia sp. 19  Genus: von Ihering, 1979

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Trinchesia sp. 19 has a translucent body scattered with opaque white spots. The smooth rhinophores are basally translucent orange, the outer half is opaque white. The oral tentacles are opaque white, basally translucent orange. The ceratal wall is translucent, the digestive glands are yellowish cream, the relative large cnidosacs are greyish. There are distinctive dark red spots on the cerata.
It looks somehow similar to Cuthona sp. 29 in IPN at page 368
which differs
- by the cerata, which have one single red spot subapically,
- by the rhinophores which are white with an orange-red subapical band,
- by the oral tentacles, which are orange with white tips, and
- by the large opaque white patch on the head
To my knowledge are these the only pictures of this species, it is not in IPN nor at the internet!
The pictures #3 , #4 , and #5 were originally posted on 10 October 2010 at these websites as AEOLIDINA sp. D Suborder: Odhner, 1934, with the comment: "I think it is most probably a Cuthona."
This species was posted on 14 August 2011 at these websites as Trinchesia sp. 19  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 31 December 2016 Trinchesia sp. 19  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 31 October 2017 into Trinchesia sp. 19  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 31 October 2017, Trinchesia sp. 19  Genus: von Ihering, 1879
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Trinchesia_sp_19.htm