Enhydrictis

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Enhydrictis
Temporal range: Early - Late Pleistocene
Enhydrictis galictoides.JPG
Fossil of Enhydrictis galictoides
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Mustelidae
Subfamily: Ictonychinae
Genus: Enhydrictis
Forsyth-Major, 1902 [1]
Type species
Enhydrictis galictoides
Other species
  • Enhydrictis praegalictoides Rook et al. 2018

Enhydrictis is a genus of extinct mustelid, belonging to the subfamily Galictinae. The type species, and best known, is Enhydrictis galictoides from the Pleistocene of Sardinia and Corsica. Some authors attribute species from mainland Eurasia to the genus, but this is disputed, with others considering the genus endemic to Sardinia-Corsica.

Contents

Taxonomy

The exact number of species of Enhydrictis has been a matter of debate. [2] One species of Pannonictis , Pannonictis pilgrimi, has been classified as a belonging to Enhydrictis (as Enhydrictis ardea), although this is unlikely. [3] [4] A 2019 study also suggests that the genus Oriensictis of Asia should be considered a synonym of Enhydrictis as well. [5] In 2016, a new species from Algeria was described. Known as Enhydrictis hoffstetteri, it is the first member of the genus known from Africa. [6] Other scholars have considered the attribution of this species to Enhydrictis doubtful, and that the species should be placed in Pannonictis instead. [7] [8] In 2018 a new species, Enhydrictis praegalictoides, was described from Middle Pleistocene aged sites on Sardinia; it is likely ancestral to E. galictoides. The Corsica-Sardinian species of Enhydrictis are thought to have evolved from a Pannonictis-like ancestor. [7]

Enhydrictis and its relatives are classified as belonging to the subfamily Galictinae [8] and the tribe Galictini. While Galictini was widespread in Eurasia during the Pliocene and Early Pleistocene, the only extant members of the tribe, the grisons ( Galictis ) and the Patagonian weasel ( Lyncodon ), are endemic to Central and South America. [7]

Description

Enhydrictis galictoides was a fairly large, robust terrestrial mustelid. [9] When first described, it was considered to be an otter-like species adapted to an aquatic lifestyle, but studies on the limb bones do not support such claims. [10]

Paleoecology

Before the arrival of humans on the islands in about 8000 BC, during the Middle and Late Pleistocene, Corsica and Sardinia had their own highly endemic depauperate terrestrial mammal fauna which included a species of dwarf mammoth ( Mammuthus lamarmorai ), the Tyrrhenian vole ( Microtus henseli ), the Sardinian pika ( Prolagus sardus ), the Tyrrhenian field rat ( Rhagamys orthodon ) one or two species of shrew belonging to the genus Asoriculus , a mole ( Talpa tyrrhenica ), the Sardinian dhole (Cynotherium sardous), three species of otter ( Algarolutra majori, Sardolutra ichnusae, Megalenhydris barbaricina ) and a deer ( Praemegaceros cazioti ). All of these species are now extinct. [11]

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<span class="mw-page-title-main">Mustelidae</span> Family of mammals

The Mustelidae are a diverse family of carnivorous mammals, including weasels, badgers, otters, martens, and wolverines. Otherwise known as mustelids, they form the largest family in the suborder Caniformia of the order Carnivora with about 66 to 70 species in nine subfamilies.

<span class="mw-page-title-main">Otter</span> Subfamily of mammals (Lutrinae)

Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine, with diets based on fish and invertebrates. Lutrinae is a branch of the Mustelidae family, which also includes weasels, badgers, mink, and wolverines, among other animals.

<span class="mw-page-title-main">Sardinian pika</span>

The Sardinian pika is an extinct species of lagomorph that was endemic to the islands of Sardinia, Corsica and neighbouring Mediterranean islands until its extinction likely in Roman times. It was last surviving member of Prolagus, a genus of lagomorph once widespread throughout Europe and North Africa during the Miocene and Pliocene epochs, that is suggested to be closely related to living pikas of the genus Ochotona.

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<span class="mw-page-title-main">Sardinian dhole</span> Extinct species of carnivore

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Mammuthus lamarmorai is a species of mammoth which lived during the late Middle and Late Pleistocene on the island of Sardinia in the Mediterranean. M. lamarmorai is a dwarf species, as it is estimated to have reached a shoulder height of only 1.4 metres (4.6 ft). It has been found mostly in the fine-grained sediments of the western part of the island.

<i>Xenocyon</i> Extinct subgenus of carnivores

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<i>Megalenhydris</i> Extinct genus of giant otter

Megalenhydris barbaricina is an extinct species of giant otter from the Late Pleistocene of Sardinia. It is known from a single partial skeleton, discovered in the Grotta di Ispinigoli near Dorgali, and was described in 1987. It was larger than any living otter, exceeding the size of South American giant otters (Petrolutra), which can reach two meters in length. The species is one of four extinct otter species from Sardinia and Corsica. The others are Algarolutra majori, Lutra castiglionis and Sardolutra ichnusae. It is suggested to have ultimately originated from the much smaller European mainland species "Lutra" simplicidens, which may be more closely related to Lutrogale than to modern Lutra species. The structure of the teeth points to a diet of bottom dwelling fish and crustaceans. A special characteristic of the species is the flattening of the first few caudal vertebrae. This might point to a slightly flattened tail.

<i>Stephanorhinus</i> Extinct genus of mammals

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<i>Rhagamys</i> Extinct rodent genus

Rhagamys is an extinct genus of rodents in the subfamily Murinae, the Old World mice and rats. The genus was established by the Swiss zoologist Charles Immanuel Forsyth Major to accommodate Rhagamys orthodon, which is the only species in the genus. It was endemic to the Mediterranean islands of Corsica and Sardinia, descending from Rhagapodemus, which had colonised the islands around 3.6 million years ago. Its closest living relatives are of the genus Apodemus, which includes the field and wood mice.

<i>Talpa tyrrhenica</i> Extinct species of mammal

Talpa tyrrhenica is an extinct species of mole belonging to the genus Talpa. It was endemic to the Mediterranean islands of Corsica and Sardinia during the Pleistocene epoch.

Microtus (Tyrrhenicola) henseli is an extinct species of vole belonging to the genus Microtus that was endemic to Sardinia and Corsica during the Pleistocene and Holocene.

<i>Canis arnensis</i> Extinct species of carnivore

Canis arnensis, the Arno River dog, is an extinct species of canine that was endemic to Mediterranean Europe during the Early Pleistocene. The Arno River dog has been described as a small jackal-like dog. Its anatomy and morphology relate it more to the modern golden jackal than to the larger Etruscan wolf of that time. It is probably the ancestor of modern jackals.

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<span class="mw-page-title-main">Ictonychinae</span> Subfamily of carnivores

Ictonychinae is a subfamily of the mammal family Mustelidae found mainly in the Neotropics and Africa, with one Eurasian member. It includes the grisons, Patagonian weasel, striped polecats, African striped weasel, and marbled polecat. These genera were formerly included within a paraphyletic definition of the mustelid subfamily Mustelinae.

<i>Pannonictis</i> Extinct genus of mustelid

Pannonictis is a genus of extinct mustelids. It is first known from the very Late Pliocene and survived until the end of the Villafranchian, and is most commonly recorded from deposits between 2.6 and 1.4 Ma. Remains of Pannonictis have been found throughout Eurasia, from the Iberian peninsula to eastern China.

<span class="mw-page-title-main">Apodemini</span>

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References

  1. "Enhydrictis". GBIF.
  2. Rook, L. (January 1995). "Pannonictis nestii (Carnivora, Mammalia) from the late Villafranchian of Pietrafitta (Umbria, Italy). Preliminary note".{{cite journal}}: Cite journal requires |journal= (help)
  3. Kurten, Bjorn (2007). Pleistocene Mammals of Europe. AldineTransaction. p. 97. ISBN   9780202309538.
  4. Colombero, S.; Pavia, M.; Rook, L. (September 2012). "Pannonictis nestii (Galictinae, Mustelidae), a new element in the vertebrate association of the human site of Pirro Nord (Italy, Early Pleistocene)". Geodiversitas. 34 (3): 665–681. doi:10.5252/g2012n3a11. hdl: 2318/126812 . S2CID   55597076.
  5. Quigao, J. (April 2019). "Discovery of Enhydrictis (Mustelidae, Carnivora, Mammalia) cranium in Puwan, Dalian, Northeast China demonstrates repeated intracontinental migration during the Pleistocene". Quaternary International. 513: 18–29. Bibcode:2019QuInt.513...18J. doi:10.1016/j.quaint.2019.01.024. S2CID   133825348.
  6. Geraads, D. (2016). "Pleistocene Carnivora (Mammalia) from Tighennif (Ternifine), Algeria" (PDF). Geobios. 49 (6): 445–458. Bibcode:2016Geobi..49..445G. doi:10.1016/j.geobios.2016.09.001. S2CID   89558550.
  7. 1 2 3 Rook, Lorenzo; Bartolini Lucenti, Saverio; Tuveri, Caterinella; Arca, Marisa (October 2018). "Mustelids (Carnivora, Mammalia) from Monte Tuttavista fissure fillings (Early and Middle Pleistocene; Orosei, Sardinia): Taxonomy and evolution of the insular Sardinian Galictini". Quaternary Science Reviews. 197: 209–223. Bibcode:2018QSRv..197..209R. doi:10.1016/j.quascirev.2018.08.022. S2CID   134162908.
  8. 1 2 Lucenti, S. (2018). "Revising the species "Mustela" ardea Gervais, 1848–1852 (Mammalia, Mustelidae): Martellictis gen. nov. and the systematics of the fossil "Galictinae" of Eurasia". Comptes Rendus Palevol. 17 (8): 522–535. Bibcode:2018CRPal..17..522B. doi: 10.1016/j.crpv.2018.02.003 .
  9. van der Geer, Alexandra; Lyras, George; de Vos, John (2011). Evolution of Island Mammals: Adaptation and Extinction of Placental Mammals on Islands. Wiley. p. 129. ISBN   9781119675747.
  10. Bate, Dorothea M. A. (July 1935). "17. Note on the Habits of Enhydrictis galictoides, with Description of some Limb-bones of this Mustelid from the Pleistocene of Sardinia". Proceedings of the Zoological Society of London. 105 (2): 241–245. doi:10.1111/j.1469-7998.1935.tb06247.x.
  11. Valenzuela, Alejandro; Torres-Roig, Enric; Zoboli, Daniel; Pillola, Gian Luigi; Alcover, Josep Antoni (2021-11-29). "Asynchronous ecological upheavals on the Western Mediterranean islands: New insights on the extinction of their autochthonous small mammals". The Holocene. 32 (3): 137–146. doi:10.1177/09596836211060491. ISSN   0959-6836. S2CID   244763779.