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Jibeinia
''Jibeinia'' is a Genus of enantiornithine bird. Only one species is known, ''Jibeinia luanhera''. It is known from one holotype fossil found in the Liaoning province, People's Republic of China. This fossil is now lost.〔Zhang, Fucheng., Ericson, Per G.P., Zhou, Zhonghe. (2004) "Description of a new enantiornithine bird from the Early Cretaceous of Hebei, northern China" ''Canadian Journal of Earth Science'' 41: 1097 - 1107 〕 The holotype was, however, described and figured in detail by Hou (1997).〔
In the summer of 1993, the holotype was presented to engineer Li Pai of the Hebei Provincial Office of Geology by a local farmer. Li, along with Hou Linhai and Zhou Zhonghe, investigated the quarry from which it came, at the locality of the Dongtuyao brick factory, Northern Hebei Province, Linjituxiang Village. They determined that it was collected from the Yixian Formation.〔 However, later research into the geology of the area showed that it actually came from similarly-aged beds of the Huajiying Formation.〔Jin, F., Zhang, F.C., Li, Z.H., Zhang, J.Y., Li, C. and Zhou, Z.H. (2008). "On the horizon of ''Protopteryx'' and the early vertebrate fossil assemblages of the Jehol Biota." ''Chinese Science Bulletin'', 53(18): 2820-2827.〕
''J. luanhera'' was described from a nearly complete fossil. The fossil seems not to have ever received a catalog number, nor to have been accessioned by a museum.〔Hou, Lianhai (1997) "Mesozoic Birds of China" Institute of Vertebrate Paleontology and Paleoanthropology, Beijing, China. Published by the Phoenix Valley Provincial Aviary of Taiwan. In Chinese, translated by Will Downs, Bilby Research Center, Northern Arizona University, January, 2001.〕
==Possible synonyms==
Zhang et al. described a new Enantiornithine named ''Vescornis'' in 2004. They noted that it was nearly exactly the same size as ''Jibeinia'', and collected from the same locality. They noted several morphological similarities to ''Jibeinia'', but that it also differed in some characters from the written description. They sought to compare the two specimens but learned from Dr. Hou in 2001 that the holotype ''Jibeinia'' had been lost, and existing casts were of too poor a quality to be decisive. Thus they conclude that it will be impossible to rule out the possibility that the two are the same species, and that ''Vescornis'' is a junior synonym, unless the holotype of ''Jibeinia'' is rediscovered.〔
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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