Socognathus

Socognathus; Temporal range: Middle Campanian to late Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Clade:	† Polyglyphanodontia
Genus:	† Socognathus ; Gao & Fox 1991
Species:	†S. unicuspis
Binomial name
	†Socognathus unicuspis; Gao & Fox 1991

Last updated June 21, 2025

Socognathus is a genus of prehistoric chamopsiid polyglyphanodontian lizards ^[1] containing species that lived from the Middle Campanian stage to the late Maastrichtian. Several specimens of the type species, Socognathus unicuspis, have been found in Alberta, Canada.^[2]^[3] A second species, Socognathus brachyodon is known from the late Maastrichtian Lance Formation; its fossils have been found in Wyoming, United States.^[1]^[4]

References

1 2 Nicholas R. Longrich; Bhart-Anjan S. Bhullar & Jacques A. Gauthier (2012). "Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary". Proceedings of the National Academy of Sciences of the United States of America. 109 (52): 21396–21401. Bibcode:2012PNAS..10921396L. doi: 10.1073/pnas.1211526110 . PMC 3535637 . PMID 23236177.
↑ Peng, J.; A. P. Russell & D. B. Brinkman (2001). "Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman Formations of the Judith River Group (Campanian) of southeastern Alberta: an illustrated guide". Provincial Museum of Alberta, Natural History Occasional Paper . 25: 1–546.
↑ Wood, D. (Jul 2010). "New species named: Kleskunsaurus grandeprairiensis". Daily Herald-Tribune . Retrieved 27 Oct 2010.
↑ Nicholas R. Longrich; Bhart-Anjan S. Bhullar & Jacques A. Gauthier (2013). "Correction for "Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary," by Nicholas R. Longrich, Bhart-Anjan S. Bhullar, and Jacques A. Gauthier, which appeared in issue 52, December 26, 2012, of Proc Natl Acad Sci USA (109:21396–21401; first published December 10, 2012; 10.1073/pnas.1211526110)". Proceedings of the National Academy of Sciences of the United States of America. 110 (16): 6608. doi: 10.1073/pnas.1303907110 . PMC 3631639 .

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[PNASsquamates-1] 1 2 Nicholas R. Longrich; Bhart-Anjan S. Bhullar & Jacques A. Gauthier (2012). "Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary". Proceedings of the National Academy of Sciences of the United States of America. 109 (52): 21396–21401. Bibcode:2012PNAS..10921396L. doi: 10.1073/pnas.1211526110 . PMC 3535637 . PMID 23236177.

[peng2001-2] Peng, J.; A. P. Russell & D. B. Brinkman (2001). "Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman Formations of the Judith River Group (Campanian) of southeastern Alberta: an illustrated guide". Provincial Museum of Alberta, Natural History Occasional Paper . 25: 1–546.

[herald-tribune-3] Wood, D. (Jul 2010). "New species named: Kleskunsaurus grandeprairiensis". Daily Herald-Tribune . Retrieved 27 Oct 2010.

[PNASsquamatescorrection-4] Nicholas R. Longrich; Bhart-Anjan S. Bhullar & Jacques A. Gauthier (2013). "Correction for "Mass extinction of lizards and snakes at the Cretaceous–Paleogene boundary," by Nicholas R. Longrich, Bhart-Anjan S. Bhullar, and Jacques A. Gauthier, which appeared in issue 52, December 26, 2012, of Proc Natl Acad Sci USA (109:21396–21401; first published December 10, 2012; 10.1073/pnas.1211526110)". Proceedings of the National Academy of Sciences of the United States of America. 110 (16): 6608. doi: 10.1073/pnas.1303907110 . PMC 3631639 .

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