Knoxosaurus
| Knoxosaurus Temporal range: Middle Permian, 270 Ma | |
|---|---|
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. 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.[1] 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.[2]
See also
References
- ↑ 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.
- ↑ 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.
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