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While this is not preserved in fossils, there is always a mineral filled gap that is present in all dinosaur teeth between the cementum and the tooth socket, which infers the presence of soft tissue in life. [6] Alveolar bone - This is a type of bone that is typically spongy in appearance and forms the tooth socket itself. [6]
Heterodontosaurids were fox-sized dinosaurs less than 2 metres (6.6 feet) in length, including a long tail. They are known mainly for their characteristic teeth, including enlarged canine-like tusks and cheek teeth adapted for chewing, analogous to those of Cretaceous hadrosaurids. Their diet was herbivorous or possibly omnivorous.
Fossils of Ankylosaurus teeth exhibit wear on the face of the crown rather than on the tip of the crown, as in nodosaurid ankylosaurs. [10] In 1982 Carpenter ascribed to baby Ankylosaurus two very small teeth that originate from the Lance and Hell Creek Formations and measure 3.2 to 3.3 mm ( 1 ⁄ 8 to 17 ⁄ 128 in) in length, respectively.
A new study suggests Tyrannosaurus rex had giant, full gums and lips that covered much of their teeth.
As a result, they portrayed the film's dinosaurs with the size, proportions, and snout shape of Deinonychus. [2] The 20-foot-long (6.1 m) Utahraptor is commonly considered to be a close match to the film's dinosaurs, which are much larger than either Deinonychus or Velociraptor were in life. [82] [83]
Trachodon (meaning "rough tooth") is a dubious genus of hadrosaurid dinosaur based on teeth from the Campanian-age Upper Cretaceous Judith River Formation of Montana, U.S. [1] It is a historically important genus with a convoluted taxonomy that has been all but abandoned by modern dinosaur paleontologists.
Pectinodon is a genus of troodontid theropod dinosaurs from the end of the Maastrichtian age of the Late Cretaceous period (66 mya). It currently contains a single valid species, Pectinodon bakkeri (sometimes classified as Troodon bakkeri), known only from teeth. [1]
Liopleurodon (/ ˌ l aɪ oʊ ˈ p l ʊər ə d ɒ n /; meaning 'smooth-sided teeth') is an extinct genus of carnivorous pliosaurid pliosaurs that lived from the Callovian stage of the Middle Jurassic to the Kimmeridgian stage of the Late Jurassic period (c. 166 to 155 mya).