Teushentherium
| Teushentherium | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Notoungulata |
| Family: | †Notohippidae |
| Genus: | †Teushentherium Martínez et al. 2021 |
| Species: | †T. camaronensis
|
| Binomial name | |
| †Teushentherium camaronensis Martínez et al., 2021
| |
Teushentherium is an extinct genus of notohippid notoungulate from the Oligocene of Argentina. Fossils have been found in the Sarmiento Formation of Argentina.[1][2]
Etymology
[edit]The genus name, Teushentherium, is derived from Teushen, one of the Chonan languages of the Tehuelche, and therion, which is Greek for "beast". The specific name refers to Camarones, a typical coastal town of Chubut Province near the Barrancas Blancas locality.[2]
Description
[edit]This animal, only known from fragmentary remains, was approximately the size of a goat. Its skull was rather massive and had a short muzzle. The dentition was complete and continuous (without diastema), and the premolars and molars were high-crowned (hypsodont), like in its relative Rhynchippus. The premolars had a well developed cingulum, while the molars were elongated. The shape of the premolars and molars was reminiscent to those of equids. Teushentherium, like its relatives, may have had a robust body with slender limbs.[2]
Taxonomy
[edit]Teushentherium was first described in 2021, based on fossilized remains found in the Sarmiento Formation in Argentina, in deposits dating to the Middle to Late Oligocene. Teushentherium was placed within the family Notohippidae, a family of toxodont notoungulates with horse-like teeth, with very high-crowned molars. More recent research, however, suggests that this group is paraphyletic, containing increasingly derived forms, some of them close to the ancestors of "true" Toxodontidae. In 2021, it was found to be the sister taxon to Mendozahippus.[2]
The following position of the Toxodontia is based on Martínez et al. 2021, showing the position of Teushentherium.[2]
| Toxodontia |
|
"Isotemnidae" Paranotohippids "Isotemnidae" "Notohippidae" | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
References
[edit]- ^ Dozo, María Teresa; Ciancio, Martín; Bouza, Pablo José; Martínez, Gastón (2014). "New association of Paleogene Mammals in Eastern of Patagonia (Chubut Province, Argentina): biochronological and paleobiogeographical implications". Andean Geology. 41 (1). doi:10.5027/andgeoV41n1-a09. hdl:11336/27088.
- ^ a b c d e Martínez, Gastón; Dozo, María T.; Gelfo, Javier N.; Ciancio, Martín R.; González-José, Rolando (2021-02-11). "A new toxodont (Mammalia, Panperissodactyla, Notoungulata) from the Oligocene of Patagonia, Argentina, and systematic considerations on the paraphyletic 'Notohippidae'". Journal of Systematic Palaeontology. 18 (24): 1995–2013. doi:10.1080/14772019.2021.1872723. ISSN 1477-2019. S2CID 232116246.
