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Pachycephalosaurus (/ ˌ p æ k ɪ ˌ s ɛ f əl ə ˈ s ɔː r ə s /; [2] meaning "thick-headed lizard", from Greek pachys-/ παχύς-"thickness", kephalon/ κεφαλή "head" and sauros/ σαῦρος "lizard") [3] is a genus of pachycephalosaurid ornithischian dinosaur. The type species, P. wyomingensis, is the only known definitive species.
This view was popularized in the 1956 science fiction story "A Gun for Dinosaur" by L. Sprague de Camp. Many paleontologists have since argued for the head-butting hypothesis, including Galton (1970) and Sues (1978). In this hypothesis, pachycephalosaurs rammed each other head-on, as do modern-day bighorn sheep and musk oxen.
This category lists dinosaur images that have been reviewed and approved at Wikipedia:WikiProject Dinosaurs/Image review either for their scientific accuracy or for their historical value. Subcategories
tr This is a list of stratigraphic units from which dinosaur body fossils have been recovered. Although Dinosauria is a clade which includes modern birds, this article covers only Mesozoic stratigraphic units. Units listed are all either formation rank or higher (e.g. group).
Lokiceratops had two curving horns more than 16 inches (40 cm) long above its eyes, small horns on its cheeks, and blades and spikes along its extended head shield. Dinosaur from Montana had horns ...
The dinosaur lived 150 million years ago in the late Jurassic period, making it millions of years older than the terrifying Tyrannosaurus rex that roamed the Earth some 66 million to 68 million ...
The only recorded find of a dinosaur fossil in Central America consists of a single femur discovered from Middle Cretaceous age deposits in Comayagua Department in the central part of Honduras. The fossil had been found in January, 1971 by Bruce Simonson and Gregory Horne, though it was later sent to the National Museum of Natural History, USA ...
This is a list of non-avian dinosaurs whose remains have been recovered in Africa.Africa has a rich fossil record. It is rich in Triassic and Early Jurassic dinosaurs. . African dinosaurs from these time periods include Megapnosaurus, Dracovenator, Melanorosaurus, Massospondylus, Euskelosaurus, Heterodontosaurus, Abrictosaurus, and Lesoth
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