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Utahraptor (meaning "Utah's predator") is a genus of large dromaeosaurid (a group of feathered carnivorous theropods) dinosaur that lived during the Early Cretaceous period from around 135 to 130 million years ago in what is now the United States.
In 1993, James Kirkland, Robert Gaston, and Donald Burge named a fossil Utahraptor ostrommaysorum for John Ostrom and Chris Mays. [52] The largest discovered example of this species is 23 feet long and had an estimated live weight over 1000 pounds. [53]
[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 ...
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.
Apart from the remains of the holotype, bones were discovered in the site that also belonged to Dakotaraptor, but which represented a more gracile morph.These included the specimens PBMNH.P.10.115.T (a right shinbone), PBMNH.P.10.118.T (a connected left astragalus and calcaneum), and KUVP 152429 (originally identified as a furcula, but now also excluded from the known remains of Dakotaraptor). [9]
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 ...
They found the bite force of Deinonychus to be between 4,100 and 8,200 newtons, ... Utahraptor is commonly considered to be a close match to the film's dinosaurs, ...
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