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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]
There is one definite example of a small derived sauropodomorph: Anchisaurus, under 50 kg (110 lb), even though it is closer to the sauropods than Plateosaurus and Riojasaurus, which were upwards of 1 t (0.98 long tons; 1.1 short tons) in weight. [51] Evolving from sauropodomorphs, the sauropods were huge.
Brown wasted little time in describing his material, [1] [2] giving it its own subfamily. [3] Saurolophus was an important early reference for other hadrosaurs, as seen in the names of Prosaurolophus ("before Saurolophus") and Parasaurolophus ("near Saurolophus"). However, little additional material has been recovered and described.
Camarasaurus (/ ˌ k æ m ər ə ˈ s ɔː r ə s / KAM-ər-ə-SOR-əs) was a genus of quadrupedal, herbivorous dinosaurs and is the most common North American sauropod fossil. Its fossil remains have been found in the Morrison Formation, dating to the Late Jurassic epoch (Kimmeridgian to Tithonian stages), between 155 and 145 million years ago.
Paleontologists found 100 eggs and 80 skeletons from a dinosaur called Mussaurus at a site in Patagonia, suggesting the animals lived in groups.
The earliest potential record of dinosaurs in North America comes from rare, unidentified (possibly theropod) footprints in the Middle-Late Triassic Pekin Formation of North Carolina. [1] However, the most reliable early record of North American dinosaurs comes from fragmentary saurischian fossils unearthed from the Upper Triassic Dockum Group ...
[1] in the Upper Cretaceous Period (mid to late Campanian), from 86.3 to 70.6 million years ago. [2] Maiasaura peeblesorum is the state fossil of Montana. The first remains of Maiasaura peeblesorum were discovered in the Two Medicine Formation near Chouteau, Montana in 1978 by Bynum, Montana resident Laurie Trexler. This holotype specimen was ...
For people, the federal government has stockpiled 10 million doses of vaccine that it believes will be effective against the current strain of bird flu, though because of the mildness of illnesses ...