Thrausmosaurus
Thrausmosaurus Temporal range: Lower Permian,
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Family: | †Varanopidae |
Genus: | †Thrausmosaurus Fox, 1962 |
Type species | |
†Thrausmosaurus serratidens Fox, 1962
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Thrausmosaurus is a genus of
Taxonomic history
Thrausmosaurus was designated by Fox to belong to the family Sphenacodontidae based on the structure and curvature of the teeth. The genus remained in Sphenacodontidae until the type material was reexamined.[2] In 1986 the type specimen was reassigned to Synapsida incertae sedis by R. R. Reisz, who was unable to identify the relationship of the material to other synapsids.[2] This opinion was reaffirmed by Sullivan and Reisz in 1999. Upon further examination of the specimens, Evans et al. in 2009 reaffirmed the validity of the genus name and placed the genus in the Varanopidae. However they were unable to determine enough distinct characters to maintain the species Thrausmosaurus serratidens, and thus declared the name nomen dubium.[2]
See also
References
- ^ R. C. Fox. 1962. Two New Pelycosaurs from the Lower Permian of Oklahoma. University of Kansas Publications, Museum of Natural History 12(6):297-307
- ^ a b c d Evans, David C., Maddin, Hillary C., & Reisz, Robert R. 2009 “A Re-evaluation of Sphenacodontid Synapsid Material from the Lower Permian Fissure Fills near Richards Spur, Oklahoma” Palaeontology 52(1):219–227