Asioryctitheria
{{short description|Extinct order of early eutherians}}
{{Automatic taxobox
| fossil_range = {{Fossilrange|109|77}}Albian–Campanian{{Cite web|title=Asioryctitheria|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=81044&is_real_user=1|access-date=2021-08-11|website=paleobiodb.org}}
| image = Asioryctes nemegtensis.jpg
| image_caption = Asioryctes nemegtensis skull
| taxon = Asioryctitheria
| authority = Novacek et al., 1997
| subdivision_ranks = Genera
| subdivision =
}}
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.Mikko's Phylogeny Archive [http://www.helsinki.fi/~mhaaramo/] {{cite web|last=Haaramo|first=Mikko|year=2007|title=Basal Eutheria – placental mammals and relatives |url=http://www.helsinki.fi/~mhaaramo/metazoa/deuterostoma/chordata/synapsida/eutheria/eutheria_1.html |accessdate= 30 December 2015}}Paleofile.com (net, info) {{cite web|url=http://www.paleofile.com/ |title=Paleofile.com |accessdate=2015-12-30 |url-status=dead |archiveurl=https://web.archive.org/web/20160111195520/http://paleofile.com/ |archivedate=2016-01-11 }}. {{cite web|url=http://www.paleofile.com/ |title=Taxonomic lists- Mammals |accessdate=30 December 2015 |url-status=dead |archiveurl=https://web.archive.org/web/20160111195520/http://paleofile.com/ |archivedate=11 January 2016 }}
- Sasayamamylos kawaii Kusuhashi et al. 2013{{cite journal |last1=Kusuhashi |first1=Nao |last2=Tsutsumi |first2=Yukiyasu |last3=Saegusa |first3=Haruo |last4=Horie |first4=Kenji |last5=Ikeda |first5=Tadahiro |last6=Yokoyama |first6=Kazumi |last7=Shiraishi |first7=Kazuyuki |title=A new Early Cretaceous eutherian mammal from the Sasayama Group, Hyogo, Japan |journal=Proceedings of the Royal Society B: Biological Sciences |date=22 May 2013 |volume=280 |issue=1759 |pages=20130142 |doi=10.1098/rspb.2013.0142|pmc=3619506 }}
- Kennalestidae Kielan-Jaworowska 1981
- Kennalestes gobiensis Kielan-Jaworowska 1981
- Asioryctidae Szalay 1977
- Asioryctes nemegetensis Kielan-Jaworowska 1975
- Ukhaatherium nesovi Novacek et al. 1997
References
{{Reflist}}
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
- [https://web.archive.org/web/20110607225340/http://home.arcor.de/ktdykes/basepi.htm MESOZOIC MAMMALS; Basal Eutheria Two, an internet directory]
- [http://www.ingentaconnect.com/content/tandf/slet/2000/00000033/00000004/art00008 A eutherian mammal from the Early Cretaceous of Russia] at Ingenta
{{Eutheria|E.}}
{{Taxonbar|from=Q2314540}}
Category:Prehistoric eutherians
Category:Early Cretaceous first appearances
Category:Late Cretaceous extinctions
Category:Taxa described in 1997
Category:Prehistoric tetrapod orders
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