A Re-Evaluation of Sphenacodontid Synapsid Material from the Lower Permian Fissure Fills near Richards Spur, Oklahoma

D. C. Evans, H. C. Maddin, and R. R. Reisz

2009

Article

Palaeontology 52(1):219-227

Find it at:

http://dx.doi.org/10.1111/j.1475-4983.2008.00837.x

Taxonomy:

• Thrausmosaurus belongs to Varanopidae - Evans et al. (2009)
• Thrausmosaurus serratidens belongs to Varanopidae - Evans et al. (2009)
• Varanopidae belongs to Eupelycosauria - Evans et al. (2009)
• Eupelycosauria belongs to Synapsida - Evans et al. (2009)