Knoxosaurus

Knoxosaurus Temporal range: Middle Permian, 270 Ma PreЄ Є O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Family:	incertae sedis
Genus:	†Knoxosaurus Olson, 1962
Type species
†Knoxosaurus niteckii Olson, 1962

Knoxosaurus is an extinct genus of non-mammalian synapsid containing the species Knoxosaurus niteckii that existed approximately 279.5 to 268 million years ago.^[1] It was named by American paleontologist Everett C. Olson in 1962 on the basis of fragmentary fossils from Middle Permian-age deposits in the San Angelo Formation of Texas in the United States.^[2] Olson placed Knoxosaurus in a new infraorder called Eotheriodontia, which he considered a transitional group between the more reptile-like "pelycosaurs" and the more mammal-like therapsids. Knoxosaurus and Olson's other eotheriodonts were later considered to be undiagnostic remains of basal synapsids, no more closely related to therapsids than are other pelycosaur-grade synapsids.^[3]

See also

• List of synapsids

References

1. "Fossilworks: Knoxosaurus niteckii". fossilworks.org. Retrieved 2016-04-15.
2. Olson, E.C. (1962). "Late Permian terrestrial vertebrates, USA and USSR". Transactions of the American Philosophical Society 52 (2): 1–224. doi:10.2307/1005904.
3. Sidor, C.A.; Hopson, J.A. (1995). "The taxonomic status of the Upper Permian eutheriodont therapsids of the San Angelo Formation (Guadalupian), Texas". Journal of Vertebrate Paleontology 15 (3 Suppl.): 53A. doi:10.1080/02724634.1995.10011277.