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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 ...
Ornithomimosauria ("bird-mimic lizards") are theropod dinosaurs which bore a superficial resemblance to the modern-day ostrich.They were fast, omnivorous or herbivorous dinosaurs from the Cretaceous Period of Laurasia (now Asia, Europe and North America), as well as possibly Africa.
Late Cretaceous dinosaurs of North America (2 C, 221 P) B. Cretaceous birds of North America (1 C, 1 P) C. Ceratopsians of North America (26 P)
Pteranodon (/ t ə ˈ r æ n ə d ɒ n /; from Ancient Greek: πτερόν, romanized: pteron ' wing ' and ἀνόδων, anodon ' toothless ') [2] [better source needed] is a genus of pterosaur that included some of the largest known flying reptiles, with P. longiceps having a wingspan of over 6 m (20 ft).
"The cliffs contain one of the most complete records of a Cretaceous dinosaur ecosystem on the planet. We are trying to document that." The Cretaceous Period lasted from 145 million to 66 million ...
Birds of North America (35 C, 130 P) M. ... Pages in category "Dinosaurs of North America" The following 4 pages are in this category, out of 4 total.
The oldest fossil evidence for paravians — the dinosaur group that includes the earliest birds and their closest relatives — appears around the middle of the Jurassic Period (201.3 million to ...
The group (along with all maniraptoran dinosaurs) is close to the ancestry of birds. Some researchers such as Maryanska et al (2002) and Osmólska et al. (2004) have proposed that they may represent primitive flightless birds. [3] [4] The most complete oviraptorosaur specimens have been found in Asia. [5] The North American oviraptorosaur ...