Asioryctitheria
| Asioryctitheria Temporal range: Early-Late Cretaceous | |
|---|---|
 | |
| Asioryctes nemegtensis skull | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Subclass: | Theria |
| Infraclass: | Eutheria |
| Order: | †Asioryctitheria Novacek et al., 1997 |
| Genera | |
| |
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.[1][2]
- Sasayamamylos kawaii Kusuhashi et al. 2013
- Kennalestidae Kielan-Jaworowska 1981
- Kennalestes gobiensis Kielan-Jaworowska 1981
- Asioryctidae Szalay 1977
- Asioryctes nemegetensis Kielan-Jaworowska 1975
- Ukhaatherium nesovi Novacek et al. 1997
References
- ↑ Mikko's Phylogeny Archive Haaramo, Mikko (2007). "Basal Eutheria – placental mammals and relatives". Retrieved 30 December 2015.
- ↑ Paleofile.com (net, info) "Archived copy". 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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