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Aurornis
''Aurornis'' is an extinct genus of theropod dinosaurs from the Jurassic period of China. The genus ''Aurornis'' contains a single known species, ''Aurornis xui'' . ''Aurornis xui'' may be the most basal ("primitive") avialan dinosaur known to date, and it is one of the earliest avialans found to date. The fossil evidence for the animal pre-dates that of the ''Archaeopteryx lithographica'', often considered the earliest bird species, by about 10 million years.〔〔
''Aurornis xui'' was first described and named by Pascal Godefroit, Andrea Cau, Hu Dong-Yu, François Escuillié, Wu Wenhao and Gareth Dyke in 2013. The generic name is derived from the Latin word ''aurora'', meaning "daybreak" or "dawn", and the Ancient Greek ὄρνις (''órnis'') meaning "bird". The specific name, ''A. xui'', honors Xu Xing.〔
==Description==
''Aurormis'' was roughly the size of a modern pheasant, with a length of . It had clawed wings and a long bony tail. Its leg bones were similar to those of ''Archaeopteryx'', but overall its anatomy was more primitive.〔 ''Aurornis'' lived roughly 160 million years ago, roughly 10 million years prior to ''Archaeopteryx'', which often has been described as the first bird.
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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