Xenocretosuchus

Xenocretosuchus Temporal range: Aptian, 136.4–125.45  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
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. kolossoviLopatin & 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

1. Fossilworks. "Xenocretosuchus." Retrieved from
2. Palaeos. "Cynodontia: Tritylodontidae." Retrieved from
3. Lopatin & Agadjanian, 2008. "A Tritylodont (Tritylodontidae, Synapsida) from the Mesozoic of Yakutia." Retrieved from
4. 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.
5. 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.