{{Short description|Genus of gastropods}} {{Automatic taxobox | image = Phestilla melanobranchia, Osezaki.jpg | image_caption = An orange individual of ''Phestilla melanobrachia'' | taxon = Phestilla | authority = Bergh, 1874 | display_parents = 3 }}
'''''Phestilla''''' is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Trinchesiidae.
Its members are unusual in feeding on hard corals, unlike other members of the family Trinchesiidae which feed on hydroids. Adult ''Phestilla'' have no cnidosacs. This genus has been investigated using DNA phylogeny and undescribed species exist.<ref name=FTH/><ref>Korshunova, T.; Martynov, A.; Picton, B. (2017). [https://doi.org/10.11646/zootaxa.4324.1.1 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.</ref><ref>Rudman, W.B., 2000 (January 29) [http://www.seaslugforum.net/factsheet/phessp1 ''Phestilla'' sp. 1.] <nowiki>[In]</nowiki> Sea Slug Forum. Australian Museum, Sydney.</ref>
==Species== Species within the genus ''Phestilla'' include:<ref name="WRMS">Bouchet, P.; Picton, B. (2025). [https://www.marinespecies.org/aphia.php?p=taxdetails&id=390813 ''Phestilla'' Bergh, 1874.] In: MolluscaBase (2026). Accessed through: World Register of Marine Species on 2026-03-07.</ref>
*''Phestilla arnoldi'' <small>Mehrotra & Caballer, 2024</small> * ''Phestilla chaetopterana'' <small>Ekimova, Deart & Schepetov, 2017</small> * ''Phestilla fuscostriata'' <small>Hu, Zhang, Xie & Qiu, 2020</small> * ''Phestilla goniophaga'' <small>Hu, Zhang, Yiu, Xie & Qui, 2020</small> * ''Phestilla lugubris'' <small>Bergh, 1870</small> * ''Phestilla melanobrachia'' <small>Bergh, 1874</small> * ''Phestilla minor'' <small>Rudman, 1981</small> * ''Phestilla panamica'' <small>Rudman, 1982</small> * ''Phestilla poritophages'' <small>Rudman, 1979</small> * ''Phestilla sibogae'' <small>Bergh, 1905</small><ref name=FTH>Faucci, A., Robert J. Toonen, & Michael G. Hadfield, (2007). Host shift and speciation in a coralfeeding nudibranch. Proceedings of the Royal Society, B Biological Sciences 274(1606):111-119.</ref> * ''Phestilla subodiosa'' <small>A. Wang, Conti-Jerpe, J. L. Richards & D. M. Baker, 2020</small> * ''Phestilla viei'' <small>Mehrotra, Caballer & Chavanich in Mehrotra, Arnold, Wang, Chavanich, Hoeksema & Caballer, 2020</small>
Species names currently considered to be synonyms: * ''Phestilla hakunamatata'' <small>Ortea, Caballer & Espinosa, 2003</small>: synonym of ''Hermosita hakunamatata'' * ''Phestilla subodiosus'' <small>A. Wang, Conti-Jerpe, J. L. Richards & D. M. Baker, 2020</small> : synonym of ''Phestilla subodiosa'' (incorrect gender agreement of specific epithet)
== References == {{Reflist}}
== External links == {{Commons category}} * [http://www.nudipixel.net/genus/phestilla/ Nudipixel page for the genus] * [https://biodiversitylibrary.org/page/10860988 Bergh, L. S. R. (1874). Neue Nacktschnecken der Südsee, malacologische Untersuchungen II. Journal des Museum Godeffroy. 2(6): 91-116] * [http://www.mapress.com/zootaxa/2012/f/z03511p080f.pdf Bieler, R. & R. E. Petit, 2012. Molluscan taxa in the publications of the Museum Godeffroy of Hamburg, with a discussion of the Godeffroy Sales Catalogs (1864–1884), the Journal des Museum Godeffroy (1873–1910), and a history of the museum. Zootaxa, 3511: 1-80] * [https://doi.org/10.1371/journal.pone.0167800 Cella, K; Carmona Barnosi, L.; Ekimova, I; Chichvarkhin, A; Schepetov, D; Gosliner, T. M. (2016). A radical solution: The phylogeny of the nudibranch family Fionidae. PLoS ONE. 11(12): e0167800] * [https://doi.org/10.11646/zootaxa.4324.1.1 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]
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Category:Trinchesiidae Category:Taxa named by Rudolph Bergh