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Phestilla minor  Rudman, 1981

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Phestilla minor is a small species, seldom more than 9 mm long. It is translucent white with opaque white markings on the notum and cerata. The cerata have two club-like swellings, one near the outer end and the other at the apex. Tenellia minor is almost always found associated with the coral Porites on which it feeds. The egg mass of Tenellia minor is semicircular, "sausage-shaped", and usually laid alongside the coral colonies.
This species was posted on 9 April 2010 at these websites as Phestilla minor  Rudman, 1981,
Cella et al. (2016) moved it into the genus Tenellia  A. Costa, 1866 in the family Fionidae  J.E. Gray, 1857,
Korshunova et al. (2017) reinstated the genus Phestilla  Bergh, 1874 and reinstated the familiy Trinchesiidae  Nordsieck, 1972 with the inclusion of the genera Catriona, Diaphoreolis, Phestilla, Tenellia, and Trinchesia.
I changed it back into Phestilla minor  Rudman, 1981 on 10 October 2017.
References:
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
More information on Phestilla minor are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 10 October 2017, Phestilla minor  Rudman, 1981
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Phestilla_minor.htm