{{Short description|Species of gastropod}} {{Speciesbox | image = | image_caption = | taxon= Phestilla sibogae | authority = Bergh, 1905<ref name=BerghPhestilla>Bergh, L. S. R. (1905). Die Opisthobranchiata der Siboga-expedition. In: Weber M. (ed.) Uitkomsten op Zoologisch, Botanisch, Oceanographisch en Geologisch Gebied verzameld in Nederlandsch Oost-Indië 1899-1900 aan boord H.M. Siboga onder commando van Luitenant ter zee 1e. kl. G.F. Tydeman. Siboga-Expeditie Monographie 50 (Livraison 25): [https://www.biodiversitylibrary.org/page/11650908 pg. 232-233], pl. 20 fig. 4-12.</ref> | synonyms = {{Species list |Aeolidia edmondsoni|Ostergaard, 1955 |Aeolidiella edmondsoni|Ostergaard, 1955 }} }} '''''Phestilla sibogae''''' is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Trinchesiidae.<ref>Picton, B.; Gofas, S.; Bouchet, P. (2017). [http://molluscabase.org/aphia.php?p=taxdetails&id=536544 ''Phestilla sibogae'' Bergh, 1905.] In: MolluscaBase (2017). Accessed on 2017-11-09.</ref> The species feeds on the hard coral genus ''Porites''. <ref>{{cite journal |last1=Rudman |first1=W.B. |title=Further studies on the anatomy and ecology of opisthobranch molluscs feeding on the scleractinian coral Porites |journal=Zoological Journal of the Linnean Society |date=April 1981 |volume=71 |issue=4 |pages=373–412 |doi=10.1111/j.1096-3642.1981.tb01136.x}}</ref>
==Description== ''Phestilla sibogae'' is an aeolid nudibranch, described originally from preserved specimens. The colour of the body and rhinophores is described a light milky white, and the cerata dirty brownish-grey with a white tip. The dorsum in rounded into the lateral body. Down the middle of the back, from head to tail, is bare, the cerata attached at the sides<ref name=BerghPhestilla/>. The long, conical cerata were noted as strongly knobbly due to the solution the animals were preserved in<ref name=BerghPhestilla/>, though the later false synonymy of ''P. sibogae'' with ''Phestilla lugubris'' suggest the two species bear a strong resemblance and thus the living creatures might also have knobbly cerata.
Please note that ''Phestilla sibogae'' <small>Bergh, 1905</small> is a taxon fully unique from ''Trinchesia sibogae'' <small>(Bergh, 1905)</small>. Both animals were first described in the very same publication on adjacent pages, ''T. sibogae'' then called ''Hervia sibogae''<ref name=BerghHervia>Bergh, L. S. R. (1905). Die Opisthobranchiata der Siboga-expedition. In: Weber M. (ed.) Uitkomsten op Zoologisch, Botanisch, Oceanographisch en Geologisch Gebied verzameld in Nederlandsch Oost-Indië 1899-1900 aan boord H.M. Siboga onder commando van Luitenant ter zee 1e. kl. G.F. Tydeman. Siboga-Expeditie Monographie 50 (Livraison 25): [https://www.biodiversitylibrary.org/page/11650907 pg. 231-232], pl. 2 fig. 17, pl. 20 fig. 1-3.</ref>, and ''P. sibogae''<ref name=BerghPhestilla/> as it is now. There has been much confusion and mishandling of these taxa over the years, with erroneous synonymy and false representation occurring frequently.
Its sure assignment to the genus ''Phestilla'' can be owed to its tooth shape, "strongly elongated needle-shape denticles" characteristic to ''Phestilla''.<ref name=teeth>Korshunova T., Lundin K., Malmberg K., Martynov A. [https://onlinelibrary.wiley.com/doi/10.1111/eva.13468 Narrowly defined taxa on a global scale: the phylogeny and taxonomy of the genera Catriona and Tenellia (Nudibranchia, Trinchesiidae) favours fine-scale taxonomic differentiation and dissolution of the ‘lumpers & splitters’ dilemma.] Evolutionary Application 2022;16:428–60.https://doi.org/10.1111/eva.13468</ref>
==Distribution== This species was described from Indonesia.<ref name=BerghPhestilla/> It was previously treated as a synonym of ''Phestilla lugubris'' but is now considered distinct due to differences in larval development and adult morphology to be a distinct species.<ref>{{cite journal |last1=Faucci |first1=Anuschka |last2=Toonen |first2=Robert J. |last3=Hadfield |first3=Michael G. |title=Host shift and speciation in a coral-feeding nudibranch |journal=Proceedings of the Royal Society B: Biological Sciences |date=2007 |volume=274 |issue=1606 |pages=111–119 |doi=10.1098/rspb.2006.3685 |publication-date=18 October 2006 |doi-access=free|pmid=17134995 |pmc=1679885 }}</ref>
== References == {{Reflist}}
==External links==
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Category:Trinchesiidae Category:Gastropods described in 1905 Category:Marine fauna of Southeast Asia Category:Marine molluscs of Asia Category:Fauna of Indonesia Category:Taxa named by Rudolph Bergh