Asioryctitheria

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Asioryctitheria
Temporal range: 109–77  Ma
Asioryctes nemegtensis.jpg
Asioryctes nemegtensis skull
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Eutheria
Order:† Asioryctitheria
Novacek et al., 1997
Genera

Asioryctitheria ("Asian digging beasts") is an extinct order of early eutherians.

Contents

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]

References

  1. ↑ "Asioryctitheria". paleobiodb.org. Retrieved 2021-08-11.
  2. ↑ Mikko's Phylogeny Archive Haaramo, Mikko (2007). "Basal Eutheria – placental mammals and relatives" . Retrieved 30 December 2015.
  3. ↑ 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.
  4. ↑ Kusuhashi, Nao; Tsutsumi, Yukiyasu; Saegusa, Haruo; Horie, Kenji; Ikeda, Tadahiro; Yokoyama, Kazumi; Shiraishi, Kazuyuki (22 May 2013). "A new Early Cretaceous eutherian mammal from the Sasayama Group, Hyogo, Japan". Proceedings of the Royal Society B: Biological Sciences. 280 (1759) 20130142. doi:10.1098/rspb.2013.0142. PMC   3619506 .

Further reading


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