Asioryctitheria
| Asioryctitheria | |
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| Asioryctes nemegtensis skull | |
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| Order: | †Asioryctitheria Novacek et al., 1997
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Asioryctitheria ("Asian digging beasts") is an extinct order of early eutherians.
Skull structure
With the exception of Prokennalestes, these advanced forms lacked a Meckelian groove. Furthermore, they were equipped with double-rooted canines, a lower premolar with a reduced or absent metaconid and a more elongated lower premolar than their predecessors. In addition, the entoconid and hypoconulid on the lower molars are untwinned, the entotympanic is non-existent, the alisphenoid is enlarged, a Vidian foramen is present as well as a promontorium linked to the paroccipital process via the crista interfenestralis.
Classification
Asioryctitheria contains at least four genera and two families.[2][3]
- Sasayamamylos kawaii Kusuhashi et al. 2013[citation needed]
- Kennalestidae Kielan-Jaworowska 1981
- Kennalestes gobiensis Kielan-Jaworowska 1981
- Asioryctidae Szalay 1977
- Asioryctes nemegetensis Kielan-Jaworowska 1975
- Ukhaatherium nesovi Novacek et al. 1997
References
- ^ "Asioryctitheria". paleobiodb.org. Retrieved 2021-08-11.
- ^ Mikko's Phylogeny Archive [1] Haaramo, Mikko (2007). "Basal Eutheria – placental mammals and relatives". Retrieved 30 December 2015.
- ^ Paleofile.com (net, info) "Paleofile.com". Archived from the original on 2016-01-11. Retrieved 2015-12-30.. "Taxonomic lists- Mammals". Archived from the original on 11 January 2016. Retrieved 30 December 2015.
Further reading
- Zofia Kielan-Jaworowska, Richard L. Cifelli, and Zhe-Xi Luo, Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure (New York: Columbia University Press, 2004), 499–501.
External links
- MESOZOIC MAMMALS; Basal Eutheria Two, an internet directory
- A eutherian mammal from the Early Cretaceous of Russia at Ingenta
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