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Temporal range: Norian,
221.5–212 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Reptiliomorpha
Clade: Amniota
Genus: Tecovasaurus
Hunt & Lucas, 1994
Type species
Tecovasaurus murryi
Hunt & Lucas, 1994

Tecovasaurus (te-KOH-va-SAWR-us) is an extinct Late Triassic amniote genus of unknown affinities, known only from teeth. It was initially described as a basal ornithischian dinosaur, subsequently reclassified as a member of the clade Archosauriformes of uncertain phylogenetic placement (Irmis et al. (2007), and later, taking into account the similarity of its teeth to the teeth of traversodontid cynodonts such as Dadadon (shared presence of teeth with sub-triangular crowns, enlarged denticles, and thecodont tooth implantation), as an amniote of uncertain affinities (Kammerer et al., 2012; though "based on dissimilarities in gross morphology and geographic separation" the authors considered it more likely that the taxon is indeed an archosauriform rather than a traversodontid). It is named after the Tecovas Formation, in Texas and Arizona, which yielded the holotype remains.


  • Irmis, R.B., Parker, W.G., Nesbitt, S.J., and Liu, J. (2007). Early ornithischian dinosaurs: the Triassic record. Historical Biology 19(1):3-22. doi:10.1080/08912960600719988.
  • Christian F. Kammerer; John J. Flynn; Lovasoa Ranivoharimanana & André R. Wyss (2012). "Ontogeny in the Malagasy Traversodontid Dadadon isaloi and a Reconsideration of its Phylogenetic Relationships". Fieldiana Life and Earth Sciences. 5: 112–125. doi:10.3158/2158-5520-5.1.112.

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