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Troodon (/ ˈ t r oʊ. ə d ɒ n / TROH-ə-don; Troödon in older sources) is a former wastebasket taxon and a potentially dubious genus of relatively small, bird-like theropod dinosaurs definitively known from the Campanian age of the Late Cretaceous period (about 77 mya). It includes at least one species, Troodon formosus, known from Montana.
Troodontidae / t r oʊ. ə ˈ d ɒ n t ɪ d iː / is a clade of bird-like theropod dinosaurs from the Late Jurassic to Late Cretaceous.During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages.
It is usually not possible to identify tooth marks on bone made by small predatory dinosaurs due to similarities in the denticles on their teeth. [8] However, there are exceptions, like an ornithomimid caudal vertebra that has tooth drag marks attributed to Saurornitholestes and a partial Troodon skeleton with preserved puncture marks. [8]
Life restoration of the juvenile type specimen Size of the holotype, compared to a human.. Mei is a troodontid, a group of small, bird-like, gracile maniraptorans.All troodontids have many unique features of the skull, such as closely spaced teeth in the lower jaw, and large numbers of teeth.
In 1995 he made it a Troodon asiaamericanus. [11] [12] In view of its provenance from the Cenomanian of Uzbekistan, it is usually seen as a different taxon from Saurornithoides. In 2000, Olshevsky renamed Troodon isfarensis Nessov 1995 into Saurornithoides isfarensis. [13] In 2007, this was shown to have been a hadrosaurid fossil. [14]
Troodon bakkeri (Carpenter, 1982) 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.
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Dinosaur Train is an animated television series aimed at preschoolers ages 3 to 6 and created by Craig Bartlett, who also created Nickelodeon's Hey Arnold!. [2] The series features a Tyrannosaurus rex named Buddy who, together with the rest of his family, who are all Pteranodons, takes the Dinosaur Train to explore the Mesozoic, and have adventures with a variety of dinosaurs.