Asioryctitheria ("Asian digging beasts") is an extinct order of early
eutheria
Eutheria (from Greek , 'good, right' and , 'beast'; ), also called Pan-Placentalia, is the clade consisting of Placentalia, placental mammals and all therian mammals that are more closely related to placentals than to marsupials.
Eutherians ...
ns.
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 Archiv]
[Paleofile.com (net, info) . ]
* ''
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
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 directoryA eutherian mammal from the Early Cretaceous of Russia
at Ingenta
Prehistoric eutherians
Early Cretaceous first appearances
Late Cretaceous extinctions
Taxa described in 1997
Prehistoric tetrapod orders
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