Unusual tetrapod teeth from the Upper Triassic Chinle Formation, Arizona, USA

@article{Irmis2005UnusualTT,
  title={Unusual tetrapod teeth from the Upper Triassic Chinle Formation, Arizona, USA},
  author={Randall B. Irmis and William G. Parker},
  journal={Canadian Journal of Earth Sciences},
  year={2005},
  volume={42},
  pages={1339-1345}
}
  • R. Irmis, W. Parker
  • Published 1 July 2005
  • Environmental Science, Geography
  • Canadian Journal of Earth Sciences
Two teeth collected from the Upper Triasssic Chinle Formation of northeastern Arizona are described here and named Kraterokheirodon colberti gen. et sp. nov. These teeth are novel in having an occlusal ridge with six cusps and a posterior shelf lacking dentine. Evidence for thecodont implantation of the root suggests amniote affinities for these teeth. They do not match any teeth known for basal vertebrates or basal tetrapods. Although the teeth display some affinities with "traversodont… 

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