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]

References

  1. ↑ Mikko's Phylogeny Archive Haaramo, Mikko (2007). "Basal Eutheria – placental mammals and relatives". Retrieved 30 December 2015.
  2. ↑ 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.


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