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Linhenykus
''Linhenykus'' is an extinct genus of alvarezsaurid theropod dinosaur from the Late Cretaceous of Inner Mongolia, China. It is the most basal known member of the Parvicursorinae. The genus gets its name from Linhe, a city near the site where fossils were first found and Greek ''nykus'', "claw". The specific name is derived from Greek ''monos'', "single", and ''daktylos'', "finger", a reference to the fact that it is the only known non-avian dinosaur to have had but a single digit.
==Description==
''Linhenykus'' was small-bodied,〔("The first single-fingered dinosaur" ) ''UCL News''. 24 January 2011.〕 being only a few feet in length. Femur length is .〔
Alvarezsauroids are known for their short forelimbs, each with a single greatly enlarged second digit. Although alvarezsaurids were once thought to have only a single digit on each forelimb, more recent evidence has shown that most species had reduced first and third digits. ''Linhenykus'' is the first known alvarezsaurid to have only a single, second, digit. Although a reduced third metacarpal is present, the phalanges or finger bones of the first or third digits were probably absent. Despite having the most reduced digits of any alvarezsauroid, ''Linhenykus'' was shown by cladistic analysis to have been a basal form as is indicated by the fact that its enlarged digit is not as large or robust as with more advanced forms.
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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