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Dryptosaurus
''Dryptosaurus'' (pron.:"") is a genus of primitive tyrannosauroid that lived approximately 67 million years ago during the latter part of the Cretaceous period in what is now Eastern North America. ''Dryptosaurus'' was a large, bipedal, ground-dwelling carnivore, that could grow up to long. Although largely unknown now outside of academic circles, a famous painting of the genus by Charles R. Knight made it one of the more widely known dinosaurs of its time, in spite of its poor fossil record. First described by E.D. Cope in 1866 and later renamed by Othniel C. Marsh in 1877, ''Dryptosaurus'' is among the first theropod dinosaurs known to science.
==Etymology==
The genus name ''Dryptosaurus'', means "tearing lizard", and is derived from the Greek words "dryptō" (δρύπτω), meaning "I tear" and "sauros" (σαυρος) meaning "lizard". The specific name ''aquilunguis'', is derived from the Latin for "having claws like an eagle's", a reference to the claws on its three-fingered hand. E.D. Cope (1866) published a paper on the specimen within a week of its discovery, and christened it ''Laelaps aquilunguis'' at a meeting of the Academy of Natural Sciences in Philadelphia.〔 "''Laelaps''", which is derived from the Greek for “hurricane” or “storm wind”, was also the name of a dog in Greek mythology that never failed to catch what it was hunting.〔Cope, E.D. (1866). "Discovery of a gigantic dinosaur in the Cretaceous of New Jersey." ''Proceedings of the Academy of Natural Sciences of Philadelphia'', 18: 275-279.〕 ''Laelaps'' gained popularity as both a poetic and evocative name and became one of the first dinosaurs described from North America, following ''Hadrosaurus'', ''Aublysodon'' and ''Trachodon''. Later it was discovered that the name ''Laelaps'' had already been given to a genus of mite, and Cope's lifelong rival O.C. Marsh changed the name in 1877 to ''Dryptosaurus''. The type species is ''Dryptosaurus aquilunguis''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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