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Thecodont dentition is a morphological arrangement in which the base of the tooth is completely enclosed in a deep socket of bone, as seen in crocodilians, dinosaurs and mammals, and opposed to acrodont and pleurodont dentition seen in squamate reptiles. [1]
Thecodontia (meaning 'socket-teeth'), now considered an obsolete taxonomic grouping, was formerly used to describe a diverse "order" of early archosaurian reptiles that first appeared in the latest Permian period and flourished until the end of the Triassic period. All of them were built somewhat like crocodiles but with shorter skulls, more ...
The most obvious features include teeth set in deep sockets, antorbital and mandibular fenestrae (openings in front of the eyes and in the jaw, respectively), [6] and a pronounced fourth trochanter (a prominent ridge on the femur). [7] Being set in sockets, the teeth were less likely to be torn loose during feeding.
This did not change when Richard Owen coined the term Dinosauria in 1842, because Owen did not recognise Thecodontosaurus as a dinosaur; in 1865, he assigned it to the Thecodontia. It was not until 1870 that Thomas Huxley became the first person to understand that it was a dinosaur, though referring it incorrectly to the Scelidosauridae. [18]
The man involved in the death of hockey player Adam Johnson has spoken out about the incident for the first time via a crowdfunding request for help with his legal fees.
Yang classified Wangisuchus in the family Euparkeriidae, which also includes the much better known Euparkeria from the Early Triassic of South Africa. He diagnosed Wangisuchus by the following characters: long and low shape of the maxilla; pointed posterior process of the maxilla; rounded anterior margin of the maxilla; thecodont tooth implantation; crurotarsal (crocodile-like) structure of ...
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