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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 ...
Possible teeth found in Maryland. Diplotomodon: Upper Cretaceous: carnivore: Dubious name for a species of tyrannosauroid from New Jersey, possibly a Dryptosaurus or a potentially new genus. Dryptosaurus: Upper Cretaceous: carnivore: Medium-sized tyrannosauroid from New Jersey. It was the first theropod unearthed in North America. Eotrachodon ...
William Parker Foulke (1816–1865) discovered the first full dinosaur skeleton in North America (Hadrosaurus foulkii, [1] which means "Foulke's big lizard") in Haddonfield, New Jersey, in 1858.
During the late 1850s, the world's first reasonably complete dinosaur skeleton was discovered in New Jersey. [68] Joseph Leidy would name it Hadrosaurus. This was the first known dinosaur, the first dinosaur to be interpreted as two-legged, and the first to be mounted for exhibition in a museum. [69]
S. armatus is both the first Stegosaurus to be discovered and the type species. [42] Its type specimen is poorly preserved, incomplete, and lacks diagnostic features. [41] It has been considered dubious, with S. stenops as the neotype species for the genus. [41] S. stenops [14] Colorado, Utah and Wyoming, Brushy Basin member [16] [14] [9] [43]
Discovered in October 1855, T. formosus was among the first dinosaurs found in North America, although it was thought to be a lizard until 1877. Several well-known troodontid specimens from the Dinosaur Park Formation in Alberta were once believed to be members of this genus.
This is a list of U.S. state dinosaurs in the United States, including the District of Columbia.Many states also have dinosaurs as state fossils, or designate named avian dinosaurs (List of U.S. state birds), but this list only includes those that have been officially designated as "state dinosaurs".
A 2016 estimate put the number of dinosaur species living in the Mesozoic at 1,543–2,468, [24] [25] compared to the number of modern-day birds (avian dinosaurs) at 10,806 species. [26] Extinct dinosaurs, as well as modern birds, include genera that are herbivorous and others carnivorous, including seed-eaters, fish-eaters, insectivores, and ...