Xenocretosuchus Explained

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.

Notes and References

  1. http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=254183 Fossilworks. "Xenocretosuchus." Retrieved from
  2. http://palaeos.com/vertebrates/cynodontia/tritylodontidae.html Palaeos. "Cynodontia: Tritylodontidae." Retrieved from
  3. Lopatin & Agadjanian, 2008. "A Tritylodont (Tritylodontidae, Synapsida) from the Mesozoic of Yakutia." Retrieved from https://link.springer.com/article/10.1134/S0012496608020117#page-1
  4. A.O. . Averianov . T. . Martin . A.V. . Lopatin . J.A. . Schultz . P.P. . Skutschas . S. . Rico . S.A. . Krasnolutskii . 2017 . A tritylodontid synapsid from the Middle Jurassic of Siberia and the taxonomy of derived tritylodontids . Journal of Vertebrate Paleontology . 37 . 5 . e1363767 . 10.1080/02724634.2017.1363767 . 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 . en . 1–10 . 10.1080/08912963.2022.2094262 . 0891-2963.

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