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Parasaurolophus (/ ˌ p ær ə s ɔː ˈ r ɒ l ə f ə s,-ˌ s ɔːr ə ˈ l oʊ f ə s /; meaning "beside crested lizard" in reference to Saurolophus) [2] is a genus of hadrosaurid "duck-billed" dinosaur that lived in what is now western North America and possibly Asia during the Late Cretaceous period, about 76.9–73.5 million years ago. [3]
The Hell Creek Formation is an intensively studied division of mostly Upper Cretaceous and some lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. The formation stretches over portions of Montana, North Dakota, South Dakota, and Wyoming. [1]
Metatherians reported from the Hell Creek Formation; Genus Species State Stratigraphic position Material Notes Images Alphadon [116] A. marshi. Montana; North Dakota [116] An alphadontid. genus of small, primitive mammal that was a member of the Metatheria, a group of mammals that includes modern-day marsupials. A. cf. marshi. Montana; South ...
Hell Creek Formation (Late Cretaceous, Maastrichtian) United States ( Montana) One of the geologically youngest dromaeosaurids Acristavus: 2011 Two Medicine Formation, Wahweap Formation (Late Cretaceous, Campanian) United States ( Montana Utah) Uniquely for a hadrosaurid, it lacked any ornamentation on its skull Acrocanthosaurus: 1950
Hell Creek Formation Named after the species name. 85% complete by bone count; among most well-preserved of the genus ‘Horridus’, the most complete Triceratops fossil known, on display at the Melbourne Museum. Jason [37] [38] Louisiana Art and Science Museum: Triceratops: Hell Creek Formation Named after discoverer, a rancher who first ...
Millions of years ago, a bird-like dinosaur, known as the “chicken from Hell,” roamed the North American continent. Weighing around 170 pounds, it sported a toothless beak and was blanketed by ...
Hell Creek Formation, Montana, USA A large sirenid, about the size of a hellbender. The palate is specialized for crushing, suggesting it may have fed on hard-bodied prey. †Paranecturus †Paranecturus garbanii; Hell Creek Formation, Montana USA A proteid closely related to the modern mudpuppies. †Piceoerpeton †Piceoerpeton naylori
A major new study has revealed a long list of benefits and some little-known risks of Ozempic and other GLP-1 medications. Experts break down the findings.