Simpsonodon

Simpsonodon is an extinct genus of docodontan mammal known from the Middle Jurassic of England, Kyrgyzstan and Russia. The type species S. oxfordensis was described from the Kirtlington Mammal Bed and Watton Cliff in the Forest Marble Formation of England. It was named after George Gaylord Simpson, a pioneering mammalologist and contributor to the Modern Evolutionary Synthesis.[1] A second species S. sibiricus is known from the Itat Formation of Russia,[2] and indeterminate species of the genus are also known from the Balabansai Formation in Kyrgyzstan[3]

Simpsonodon Temporal range: Middle Jurassic Bathonian-Callovian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Therapsida
Clade:	Cynodontia
Clade:	†Docodonta
Genus:	†Simpsonodon Kermack et al, 1987
Type species
†Simpsonodon oxfordensis Kermack et al, 1987
Other species
†S. sibiricus (Averianov et al, 2010)

References

1. KERMACK, K. A.; LEE, A. J.; LEES, PATRICIA M.; MUSSETT, FRANCES (January 1987). "A new docodont from the Forest Marble". Zoological Journal of the Linnean Society. 89 (1): 1–39. doi:10.1111/j.1096-3642.1987.tb01342.x. ISSN 0024-4082.
2. Averianov, A. A.; Lopatin, A. V.; Krasnolutskii, S. A.; and Ivantsov, S. V. (2010). "New docodontians from the Middle Jurassic of Siberia and reanalysis of docodonta interrelationships" (PDF). Proceedings of the Zoological Institute RAS. 314 (2): 121–148.CS1 maint: uses authors parameter (link)
3. Martin, Thomas; Averianov, Alexander O. (2010-05-18). "Mammals from the Middle Jurassic Balabansai Formation of the Fergana Depression, Kyrgyzstan". Journal of Vertebrate Paleontology. 30 (3): 855–871. doi:10.1080/02724631003758045. ISSN 0272-4634.