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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 ...
Restoration of C. propython.. Clidastes was the one of the smallest of the mosasaurs (the smallest known being Dallasaurus), averaging 2–4 meters (6.6–13.1 ft) in length, with the largest specimens reaching 6.2 meters (20 feet) long. [4]
A complete mastodon jaw was discovered in the backyard of a home in New York's Hudson Valley, marking the state's first such find in more than a decade, officials announced this week.
An animal's dentition for either deciduous or permanent teeth can thus be expressed as a dental formula, written in the form of a fraction, which can be written as I.C.P.M I.C.P.M, or I.C.P.M / I.C.P.M. [10] [11] For example, the following formulae show the deciduous and usual permanent dentition of all catarrhine primates, including humans:
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]
Image credits: Bored Panda #2 Dave Grohl Fathered A Baby Girl Outside Of His Marriage. Lead singer of the Foo Fighters Dave Grohl isn’t trying to hide his truth. Back in September, the musician ...
The dentition of Cymbospondylus is generally thecodont, meaning that the tooth roots are deeply cemented into the jawbone. However, not all species share the same robustness in terms of their dental implantation. C. petrinus has a particular form of thecodont dentition, its teeth appearing to be fused at the bottom of the alveoli. [70]
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