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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] Notably, this appears to be the ancestral tooth condition in Amniota. [2]
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 ...
In the late nineteenth century, the theory became popular that such remains belonged to carnivorous prosauropods: animals with the body of Thecodontosaurus, but with slicing teeth. In 1890, Arthur Smith Woodward accordingly named a Thecodontosaurus platyodon, [ 6 ] and in 1908 Friedrich von Huene named a Thecodontosaurus cylindrodon . [ 7 ]
This feature is responsible for the name "thecodont" (meaning "socket teeth"), [8] which early paleontologists applied to many Triassic archosaurs. [7] Additionally, non-muscular cheek and lip tissue appear in various forms throughout the clade, with all living archosaurs lacking non-muscular lips, unlike most non-avian saurischian dinosaurs. [ 9 ]
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The teeth are stout at the base, with slightly recurved and sharp points. [5] The first four to five maxillary teeth (anterior) are the largest at the primitive position of the canines. [5] [3] These teeth are moderately elongated, flattened, and present an obtuse apex. [3] The premaxillary and maxillary teeth are typical thecodont teeth. [8]
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The Litter-Robot 4 is one of the best self-cleaning litter robots on the market, but it costs a cool $700. We put it to the test to see if it's really worth that high price point.
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