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The Early Cretaceous was an important time for the dinosaurs of Africa because it was when Africa finally separated from South America, forming the South Atlantic Ocean. This was an important event because now the dinosaurs of Africa started developing endemism because of isolation. The Late Cretaceous of Africa is known mainly from North Africa.
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 ...
Fossil footprints are the most common kind of early dinosaur fossil in the eastern United States. [57] As the Triassic ended, Pangaea was breaking up into separate continents again. Rift valleys formed along the east coast as the North American, European and African plates diverged. [58] This process created rifts down the east coast to Florida ...
They worked for five years collecting many dinosaurs already known from the formation, but also the new species Ceratosaurus nasicornis. [58] Beginning in 1877, the plentiful dinosaur remains preserved in Wyoming came to the attention of scientists. Three men played a pivotal early role in bringing scientific attention to the area's dinosaurs.
The discovery of fossils led 19th century Americans to rethink their place in the world.
Spinosauridae (or spinosaurids) is a clade or family of tetanuran theropod dinosaurs comprising ten to seventeen known genera. Spinosaurid fossils have been recovered worldwide, including Africa, Europe, South America and Asia. Their remains have generally been attributed to the Early to Mid Cretaceous. Spinosaurids were large bipedal carnivores.
More than 260 dinosaur footprints discovered in Brazil and Cameroon provide further evidence that South America and Africa were once connected as part of a giant continent millions of years ago.
These ideas revolutionized dinosaur paleontology through a period called the Dinosaur Renaissance. [74] Another notable 20th-century find occurred in Montana during the 1970s. Jack Horner and Bob Makela's new duck-billed dinosaur genus Maiasaura provided both the first known dinosaur nests in North America as well as early evidence that ...