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Protarchaeopteryx
''Protarchaeopteryx'' (meaning "before ''Archaeopteryx''") is a genus of turkey-sized feathered theropod dinosaur from China.〔Ji, Q., and Ji, S. (1997). "Protarchaeopterygid bird (''Protarchaeopteryx'' gen. nov.)—fossil remains of archaeopterygids from China." ''Chinese Geology'', 238: 38–41.〕 Known from the Jianshangou bed of the Yixian Formation, it lived during the early Aptian age of the Early Cretaceous, approximately 124.6 million years ago.〔Zhou, Z. (2006). "Evolutionary radiation of the Jehol Biota: chronological and ecological perspectives." ''Geological Journal'', 41: 377-393.〕 It was probably an herbivore or omnivore, although its hands were very similar to those of small carnivorous dinosaurs. It appears to be one of the most basal members of the Oviraptorosauria, closely related to or synonymous with ''Incisivosaurus''.〔Paul G.S. (2010), ''The Princeton Field Guide to Dinosaurs'', Princeton University Press, p. 146–145〕
==Description==
''Protarchaeopteryx'' had long legs, and could have been a quick runner. It had well-developed, vaned feathers extended from a relatively short tail; the hands were long and slender, and had three fingers with sharp, curved claws. Its bones were hollow and bird-like, and it possessed a wishbone. At around in length, it would have been larger than ''Archaeopteryx''.〔 ''Protarchaeopteryx'' also had symmetrical feathers on its tail. Since modern birds that have symmetrical feathers are flightless, and the skeletal structure of ''Protarchaeopteryx'' would not support flapping flight, it is assumed that it was flightless as well.〔Ji, Q., and Ji, S. (1997). "A Chinese archaeopterygian, ''Protarchaeopteryx'' gen. nov." ''Geological Science and Technology (Di Zhi Ke Ji)'', 238: 38-41. Translated By Will Downs Bilby Research Center Northern Arizona University January, 2001〕 It has been suggested that it could have had an arboreal lifestyle, jumping from tree limbs and using its forelimbs for a form of parachuting.〔Currie P.J. (2004), ''Feathered dragons: studies on the transition from dinosaurs to birds'', Indiana University Press, p. 184, plate 16.〕
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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