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] Notably, this appears to be the ancestral tooth condition in Amniota.
[2] This morphology was once used as a basis for the now-defunct taxonomic group Thecodontia.
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