Taxonomic Swap 53920
(Committed on 2019-02-18)
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Comments
Trinchesia sibogae is the valid species for most of the records now placed under Phestilla sibogae: http://www.marinespecies.org/aphia.php?p=taxdetails&id=834113
Below are the synonymies of both taxa according to WoRMS - Tenellia sibogae is a synonym of Phestilla sibogae not of Trinchesia sibogae. The swap was necessary to correct an earlier swap of Cuthona sibogae for Tenellia sibogae.
Trinchesia sibogae
Orig. name
Hervia sibogae Bergh, 1905
Synonymised names
Cuthona sibogae (Bergh, 1905)
Hervia sibogae Bergh, 1905 (original combination)
Phestilla sibogae
Orig. name
Phestilla sibogae Bergh, 1905
Synonymised names
Aeolidia edmondsoni Ostergaard, 1955
Aeolidiella edmondsoni (Ostergaard, 1955)
Tenellia sibogae (Bergh, 1905)
for discussion of swap see https://www.inaturalist.org/flags/336762#activity_comment_2571115
Agree that's what WoRMS says, but it fails to account for the previous changes in the taxonomy of former Tergipedidae.
I'm sorry, I don't follow you. Below is the WoRMs account of Tergipedidae inc those taxa formerly included that have been reclassified. These names aren't mentioned.
Tergipedidae Bergh, 1889
Classification
Biota Animalia (Kingdom) Mollusca (Phylum) Gastropoda (Class) Heterobranchia (Subclass) Euthyneura (Infraclass) Ringipleura (Subterclass) Nudipleura (Superorder) Nudibranchia (Order) Cladobranchia (Suborder) Fionoidea (Superfamily) Tergipedidae (Family)
Status
accepted
Rank
Family
Parent
Fionoidea Gray, 1857
Synonymised names
Tergipedinae Bergh, 1889
All children (18)
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Genus Tergipes Cuvier, 1805
» Species Tergipes antarcticus Pelseneer, 1903
» Species Tergipes edwardsii Nordmann, 1844
» Species Tergipes tergipes (Forsskål in Niebuhr, 1775)
» Species Tergipes adspersus Nordmann, 1845 accepted as Tenellia adspersa (Nordmann, 1845)
» Species Tergipes affinis d'Orbigny, 1837 accepted as Doto affinis (d'Orbigny, 1837)
» Species Tergipes capellinii Trinchese, 1879 accepted as Eubranchus capellinii (Trinchese, 1879) (original combination)
» Species Tergipes despectus (G. Johnston, 1835) accepted as Tergipes tergipes (Forsskål in Niebuhr, 1775)
» Species Tergipes doriae (Trinchese, 1874) accepted as Eubranchus doriae (Trinchese, 1874) (synonym)
» Species Tergipes fustifer Lovén, 1846 accepted as Eubranchus exiguus (Alder & Hancock, 1848) (synonym)
» Species Tergipes lacinulatus (Gmelin, 1791) accepted as Doris lacinulata Gmelin, 1791
» Species Tergipes lacinulatus Blainville, 1824 accepted as Tergipes tergipes (Forsskål in Niebuhr, 1775) (synonym)
» Species Tergipes pulcher G. Johnston, 1834 accepted as Limacia clavigera (O. F. Müller, 1776) (synonym)
» Species Tergipes rupium Møller, 1842 accepted as Eubranchus rupium (Møller, 1842) (original combination)
» Species Tergipes valentini (Eliot, 1907) accepted as Cuthona valentini (Eliot, 1907)
Genus Psiloceros Menke, 1844 accepted as Tergipes Cuvier, 1805
» Species Psiloceros claviger Menke, 1844 accepted as Tergipes tergipes (Forsskål in Niebuhr, 1775)
Subfamily Tergipedinae Bergh, 1889 accepted as Tergipedidae Bergh, 1889
Environment
marine
Original description
Not documented
Taxonomic citation
MolluscaBase (2019). MolluscaBase. Tergipedidae Bergh, 1889. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=194 on 2019-02-19
Simple, between the original descriptions and the latest revisions there have been many changes. One of them, not so long ago, started by moving all Cuthona spp. (except for Cuthona nana) to Trinchesia. Then, many of these were revised (cf. 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., available online at https://doi.org/10.1371/journal.pone.0167800) with some moving to Tenellia. Somehow, someone not familiar with all the changes moved species with the same epithet between "not so far related" genera as if they were one. Now, are Hervia sibogae Bergh, 1905 and Phestilla sibogae Bergh, 1905 the same? No (https://www.biodiversitylibrary.org/item/42940#page/336/mode/1up).
Bottom line, Phestilla sibogae and Trinchesia sibogae are both valid with different original names. Between 1095 and now, there may have been times (although not the same) both species were revised and placed under Tenellia. And that is the cause of this confusion.
Agreed, Phestilla sibogae and Trinchesia sibogae are both valid with different original names. Now that I've added Trinchesia sibogae, they are both in iNat. It seems the PLoS ONE paper that lumped several genera into Tenellia has been ignored by the taxonomists, as often happens to molecular studies that attempt drastic revisions but tend to do a poor job of the finickity details of the taxonomy (correct citation of names etc.). I've only skimmed the paper so I don't know if this is the case but I suspect it's so, even if their data supports their argument. The paragraph that rather glibly synonymised Phistella sibogae with P. lugubris, thus avoiding a secondary homonym, would have raised some hackles, I think. This is probably why their revisions don't appear in WoRMs and also why iNat doesn't use the primary literature for its taxonomy but instead relies upon selected authorities such WoRMS which provide some stability and unambiguous synonymies.
This swap has caused dozens of errors by placing Trinchesia sibogae (Tenellia sibogae) as a synonymous of Phestilla sibogae.