Xenocretosuchus

Xenocretosuchus; Temporal range: Aptian, 136.4–125.45 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	Cynodontia
Family:	†Tritylodontidae
Genus:	†Xenocretosuchus; Tatarinov & Matchenko, 1999
Type species
	Xenocretosuchus sibiricus; Tatarinov & Matchenko, 1999
Other species
	X. kolossovi Lopatin & Agadjanian, 2008;

Xenocretosuchus is an extinct genus of tritylodont therapsids from the Aptian (Early Cretaceous) Ilek Formation of Siberia, in the Russian Federation.^[1] The type species, X. sibiricus, is known only from dental elements,^[2] as is X. kolossovi, described from the Batylykh Formation in 2008.^[3] Some authors have treated these species as part of the genus Stereognathus, otherwise known from the Middle Jurassic of Britain,^[4] but this is rejected by other authors.^[5]

Alongside Montirictus and Fossiomanus, it is amongst the latest known non-mammaliform synapsids, extending their range to the Early Cretaceous.

References

^ Fossilworks. "Xenocretosuchus." Retrieved from
^ Palaeos. "Cynodontia: Tritylodontidae." Retrieved from
^ Lopatin & Agadjanian, 2008. "A Tritylodont (Tritylodontidae, Synapsida) from the Mesozoic of Yakutia." Retrieved from [1]
^ Averianov, A.O.; Martin, T.; Lopatin, A.V.; Schultz, J.A.; Skutschas, P.P.; Rico, S.; Krasnolutskii, S.A. (2017). "A tritylodontid synapsid from the Middle Jurassic of Siberia and the taxonomy of derived tritylodontids". Journal of Vertebrate Paleontology. 37 (5): e1363767. doi:10.1080/02724634.2017.1363767. S2CID 90249441.
^ Liu, Lu; Zhou, Chang-Fu; Wang, Jia-Shu; Xue, Jin-Zhuang (2022-07-06). "A new tritylodontid from the Middle Jurassic Shaximiao Formation of western Hubei, China". Historical Biology: 1–10. doi:10.1080/08912963.2022.2094262. ISSN 0891-2963.

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