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Dryosaurus grandis : ウィキペディア英語版 | Dryosaurus grandis
"Dryosaurus" ''grandis'' is a dubious species of theropod dinosaur known from remains found in the Arundel Formation of Maryland, with a complex history of classification. Matthew and Brown (1922) formerly classified it under the name ''Ornithomimus affinis'' (Gilmore, 1920)〔Matthew, W.D. and B. Brown. 1922. The family Deinodontidae, with notice of a new genus from the Cretaceous of Alberta. Bulletin of the American Museum of Natural History 46(6):367-385.〕 which was, in turn, a replacement name for ''Dryosaurus grandis'' (Lull, 1911).〔Lull, R.S. 1911. Systematic paleontology of the Lower Cretaceous deposits of Maryland: Vertebrata. Maryland Geological Survey: Lower Cretaceous 183-211.〕 Gilmore (1920) placed ''Dryosaurus grandis'' in the genus ''Ornithomimus'', which rendered Lull's name secondarily preoccupied by ''Ornithomimus grandis'' (Marsh, 1890) and necessitated the replacement name ''Ornithomimus affinis''.〔Gilmore, C.W.. 1920. Osteology of the carnivorous Dinosauria in the United States National Museum, with special reference to the genera Antrodemus (Allosaurus) and Ceratosaurus. Bulletin of the United States National Museum 110:1-154.〕 However, the holotype specimen of ''Ornithomimus grandis'' comes from the Eagle Sandstone of Montana and is presumed lost,〔Osborn, H.F. (1916). "Skeletal adaptations of ''Ornitholestes, Struthiomimus, Tyrannosaurus''." ''Bulletin of the American Museum of Natural History'', 35(43), 733-771.〕 while Smith and Galton (1990) could not identify the Arundel taxon beyond the level of Theropoda.〔Smith and Galton, 1990. Osteology of Archaeornithomimus asiaticus (Upper Cretaceous, Iren Dabasu Formation, People's Republic of China). Journal of Vertebrate Paleontology.〕 ==References==
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