Dinodontosaurus
Temporal range: Mid-Late Triassic
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Mounted Dinodontosaurus skeleton
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Suborder: †Anomodontia
Clade: †Dicynodontia
Clade: †Kannemeyeriiformes
Genus: †Dinodontosaurus
Romer, 1943
Type species
†Dinodontosaurus oliveirai
Species
  • D. brevirostris Cox, 1968
  • D. tener (Huene, 1935)
  • D. turpior (Huene, 1935) [nomen dubium]
Synonyms[1]
Genus Synonymy
Species Synonymy
  • D. brevirostris:
    • Chanaria platyceps Cox, 1968
    • D. platygnathus Cox, 1968
  • D. tener:
    • Diodontosaurus pedroanum Tupí-Caldas, 1936
    • D. oliveirai Romer, 1943

Dinodontosaurus (meaning "terrible-toothed lizard") is a genus of dicynodont therapsid. It was medium to large dicynodont of the Triassic (with skull up to 40 centimetres (16 in) long[1]) and had a beak corneum. It lived in the Middle Triassic but disappeared in the Upper Triassic.

Species

  • Dinodontosaurus tener is the most common species of dicynodont that existed in the Middle Triassic, and more common in the fossil layers that age in Rio Grande do Sul, in Rota Paleontológica. They are found mainly in the Paleontological Site Chiniquá in São Pedro do Sul and Candelária, where a group of ten pups were found together, demonstrating that these animals had strategies for coexistence in a group and caring for their offspring. Diodontosaurus pedroanum Tupi-Caldas, 1936 and Dinodontosaurus oliveirai, Romer 1943 are synonyms.[2]
  • Dinodontosaurus brevirostris is known from remains found in Argentina. Chanaria platyceps Cox, 1968 and Dinodontosaurus platygnathus are synonyms.

Phylogeny

Dinodontosaurus in a cladogram from Szczygielski & Sulej (2023):[3]

Kannemeyeriiformes
Shansiodontidae

Rhinodicynodon

Tetragonias

Shansiodon

Vinceria

Dinodontosaurus

"Kannemeyeriidae"

Dolichuranus

Acratophorus

Rabidosaurus

Wadiasaurus

Sinokannemeyeria

Parakannemeyeria

Xiyukannemeyeria

Rhadiodromus

Shaanbeikannemeyeria

Kannemeyeria

Rechnisaurus

Uralokannemeyeria

Angonisaurus

Woznikella

Stahleckeriidae

References

  1. 1 2 Kammerer, C. F.; Ordoñez, M. D. (2021). "Dicynodonts (Therapsida: Anomodontia) of South America". Journal of South American Earth Sciences. 108: 103171. Bibcode:2021JSAES.10803171K. doi:10.1016/j.jsames.2021.103171. S2CID 233565963.
  2. ↑ Paleobiology Database.
  3. ↑ Szczygielski, T.; Sulej, T. (2023). "Woznikella triradiata n. gen., n. sp. – a new kannemeyeriiform dicynodont from the Late Triassic of northern Pangea and the global distribution of Triassic dicynodonts". Comptes Rendus Palevol. 22 (16): 279–406. doi:10.5852/cr-palevol2023v22a16.
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