![]() Evidence from the leg physiology supports the idea of Utahraptor being an ambush predator, in contrast to other dromaeosaurs that were pursuit-predators.ĭiscovery and naming Premaxilla of BYU 7510 14585 Being a carnivore, Utahraptor was adapted to hunt the other animals of the Cedar Mountain Formation ecosystem such as ankylosaurs and iguanodonts. ![]() Utahraptor is in the subfamily Dromaeosaurinae, which contained the biggest of the dromaeosaurs in the form of Utahraptor as well as Dakotaraptor and Achillobator. Its skull was boxy and elongated, akin to other dromaeosaurids like Dromaeosaurus and Velociraptor. The jaws of Utahraptor were lined with small, serrated teeth that were used in conjunction with a large "killing claw" on its second toe to dispatch its prey. Its large size and variety of unique features have earned it attention in both pop culture and the scientific community. It contains a single species, Utahraptor ostrommaysi, which is the largest-known member of the family Dromaeosauridae, measuring 4.9–5.5 m (16–18 ft) long and weighing 500 kg (1,100 lb). It was a heavily built, ground-dwelling, bipedal carnivore. Later, many additional specimens were described including those from the skull and postcranium in addition to those of younger individuals. The genus was described in 1993 by American paleontologist James Kirkland and colleagues with the type species Utahraptor ostrommaysi, based on fossils that had been unearthed earlier from the Cedar Mountain Formation of Utah. 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.
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