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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.
English: A chart showing the approximate size of the dromaeosaurid Utahraptor compared to a human. Estimate of 7 meters is based on Kirkland et al. 1993. Date:
Velociraptor (top) and Utahraptor (bottom) specimens compared to a 1.8 m (5.9 ft) tall human Dromaeosaurids were small to medium-sized dinosaurs, ranging from 1.5–2.07 metres (4.9–6.8 ft) in length (in the case of Velociraptor ) to approaching or over 6 m (20 ft) (in Utahraptor , Dakotaraptor and Achillobator ).
Size compared to a human. Maip is estimated to have been around 9–10 metres (30–33 ft) long in life. As such, it may be the largest megaraptorid currently known. Members of the Megaraptoridae as a whole increased in body length following the extinction of the carcharodontosaurids in the Southern Hemisphere in the early Late Cretaceous. [4]
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.
This list of nicknamed dinosaur fossils is a list of fossil non-avian dinosaur specimens given informal names or nicknames, in addition to their institutional catalogue numbers.
The park is located east of U.S. Route 191 and west of Arches National Park, and covers 6,500 acres (26 km 2).The park contains the Dalton Wells Quarry, which have yielded remains of dinosaurs that have advanced understanding of paleontology, such as those of the giant dromaeosaur dinosaur Utahraptor ostrommaysi. [2]
The Utahraptor, however, was a more accurate dinosaur in size comparison to the franchise's Velociraptors; it was discovered shortly before the 1993 release of Jurassic Park ' s film adaptation. [12] [13] Special-effects artist Stan Winston, who worked on the raptors, joked: "After we created it, they discovered it". [12]