Opisthocoelicaudia Opisthocoelicaudia (oh-PIS-thoh-see-lih-KAW-dee-uh; “tail vertebrae hollowed at the back”) is a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period, approximately 70 million years ago. Fossils of this dinosaur were discovered in the Nemegt Formation of the Gobi Desert in Mongolia. The name Opisthocoelicaudia refers to the distinctive shape of its tail […]
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“`html Oplosaurus: Profile of a Prehistoric Giant Oplosaurus Oplosaurus (OP-loh-SAWR-us; “Weapon Lizard”) is a genus of sauropod dinosaur known from the Early Cretaceous period, approximately 140 to 130 million years ago (Valanginian stage). Its fossil remains, consisting of a single large tooth, were discovered in the Wealden Group deposits of Cuckfield, Sussex, in England. The
Orkoraptor: Profile of a Prehistoric Giant Orkoraptor Orkoraptor (OR-ko-RAP-tor; “Toothed River Raider”) is a genus of meat-eating dinosaur that lived during the Late Cretaceous period, about 70 million years ago. Its fossils were discovered in what is now Patagonia, in southern Argentina. The name Orkoraptor comes from the Aonikenk language of the Tehuelche people, where
“`html Ornatotholus Ornatotholus (or-NAH-toh-THO-lus; “ornamented dome”) is a genus of pachycephalosaurid, or “dome-headed,” dinosaur that lived during the Late Cretaceous period, approximately 76 to 75 million years ago. Its fossils were discovered in what is now Alberta, Canada, specifically in the Dinosaur Park Formation. The name Ornatotholus refers to the decorative pattern of grooves and
“`html Ornithodesmus: Profile of a Prehistoric Giant Ornithodesmus Ornithodesmus (OR-nith-oh-DEZ-mus; “Bird Link”) is a genus of small theropod dinosaur believed to have lived during the Early Cretaceous period, approximately 125 million years ago, in what is now England. The name was originally given by Harry Govier Seeley in 1887 because he initially thought the first
Ornitholestes Ornitholestes (OR-nith-oh-LES-teez; “Bird Robber”) is a genus of small, agile theropod dinosaur that lived during the Late Jurassic period, approximately 154 to 150 million years ago. Its fossils have been discovered in the Morrison Formation of Wyoming, in the United States. The name Ornitholestes, meaning “bird robber,” was given by paleontologist Henry Fairfield Osborn
“`html Ornithomimoides: Profile of a Prehistoric Giant Ornithomimoides Ornithomimoides (OR-nith-oh-mim-OY-deez; “Bird mimic form”) is a genus of theropod dinosaur that lived during the Late Cretaceous period, around 70 to 66 million years ago. Its fossils were discovered in what is now India. The name Ornithomimoides was given by paleontologists Friedrich von Huene and Charles Matley
“`html Ornithomimus: Profile of a Prehistoric Giant Ornithomimus Ornithomimus (Or-NITH-oh-MIME-us; “Bird mimic”) is a genus of ornithomimid theropod dinosaur that lived during the Late Cretaceous period, approximately 70 to 66 million years ago, in what is now western North America. Its name reflects its slender, bird-like appearance, particularly its long legs and neck. The first
“`html Ornithopsis: Profile of a Prehistoric Giant Ornithopsis Ornithopsis (OR-nih-THOP-sis; “bird aspect”) is a genus of sauropod dinosaur that lived during the Early Cretaceous period, approximately 130 to 125 million years ago, in what is now England. The name, given by paleontologist Harry Govier Seeley in 1870, refers to the bird-like internal structure of its
“`html Ornithosuchus: Profile of a Prehistoric Giant Ornithosuchus Ornithosuchus (or-NITH-oh-SOOK-us; “bird crocodile”) is an extinct genus of archosaur, a group of reptiles that includes crocodiles, dinosaurs, and birds. It lived during the Late Triassic period, approximately 228 to 221 million years ago (Carnian stage), in what is now Scotland. The primary species, Ornithosuchus longidens, was
