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Vancleavea
''Vancleavea'' is a genus of extinct, armoured, non-archosaurian archosauriform with relatively small limbs from the Late Triassic of western North America. The type and only species is ''V. campi'', named by Robert Long & Phillip A Murry, 1995. A nearly complete and articulated skeleton was discovered at the Coelophysis Quarry in north-central New Mexico (Ghost Ranch), USA, and was prepared at the Ruth Hall Museum of Paleontology in Abiquiú, New Mexico before being formally described in the ''Zoological Journal of the Linnean Society'' in 2009. ''Vancleavea'' was first discovered in 1962 from the Petrified Forest Member of the Petrified Forest National Park and initially described by Long and Murry in 1995.〔 The genus is named after Phillip Van Cleave, who discovered the first known remains of the genus. ''Vancleavea'' is a fairly common occurrence in most levels of the Chinle Formation, however, due to the poorly preserved remains, it is difficult to compare specimens across stratigraphic levels.
==Description==
''Vancleavea'' was around 1.2 m (3.9 ft) in length. Imbricating osteoderms cover the entire body, the limbs are relatively short, and the skull is highly ossified.〔 The supratemporal fenestra is absent, which may represent a secondary closure rather than a plesiomorphic trait. The nares open dorsally (i.e. nostrils face upward) and the jaw contains enlarged caniniform fangs. Each osteoderm possesses a pronounced central keel and an anterior projection. The illium of ''Vancleavea'' resembles those of unrelated drepanosaurs.〔 The unique morphology of ''Vancleavea'' differs greatly from any other known basal archosauriform.〔
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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