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Utahraptor was one of, if not the largest and heaviest of all dromaeosaurids, with the largest assigned specimen BYUVP 15465 having a femoral length of 56.5–60 cm (22.2–23.6 in). [8] [9] Utahraptor is estimated to have reached 6–7 metres (20–23 ft) in length and somewhat less than 500 kg (1,100 lb), comparable in weight to a polar bear.
Dromaeosaurus (/ ˌ d r oʊ m i ə ˈ s ɔːr ə s,-m i. oʊ-/; [3] lit. ' running lizard ') is a genus of dromaeosaurid theropod dinosaur that lived during the Late Cretaceous period (middle late Campanian and Maastrichtian), sometime between 80 and 69 million years ago, in Alberta, Canada and the western United States.
[11] [12] Large size appears to have evolved at least twice among dromaeosaurids; once among the dromaeosaurines Utahraptor and Achillobator, and again among the unenlagiines (Austroraptor, which measured 5–6 m (16–20 ft) long). A possible third lineage of giant dromaeosaurids is represented by isolated teeth found on the Isle of Wight ...
Tyrannosaurus Rex. Brachiosaurus. Triceratops. Velociraptor. All of these wacky dinosaur names are known in large part due to Steven Spielberg’s 1993 sensation “Jurassic Park,” which has now ...
Fossils of Tawa-like dinosaurs have also been found in South America, which has important indications about paleogeography. During the Early Jurassic Period, dinosaurs such as Dilophosaurus, Anchisaurus, Coelophysis (formerly known as Megapnosaurus), and the early thyreophoran Scutellosaurus lived in North America.
The youngest date for Morrison just below the Cedar Mountain Formation is 135.10 ± 0.30 ... Before it was discovered, ... Utahraptor from the Yellow Cat Member ...
[1] [2] The type specimen was found alongside 4 partial skeletons of Gastonia that were placed as paratypes, along with the type specimen of Utahraptor and an iguanodontid. [1] [2] Gastonia is among the most common dinosaur fossils in the Cedar Mountain Formation, with many individuals being found across several quarries in the southwest.
Raptor Red was an attempt to introduce Utahraptor to the public, as well as explain some of Bakker's theories regarding dinosaur behavior. [2]: 6–8 Bakker originally suggested the genus name Utahraptor for a new dinosaur specimen that had been found by an amateur bone-hunter in Utah.