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Plateosauridae is a family of plateosaurian sauropodomorphs. Plateosaurids were early sauropodomorph dinosaurs which existed in Asia, Europe and South America during the Late Triassic period. Although several dinosaurs have been classified as plateosaurids over the years, a 2007 study by Adam M. Yates found only ''Plateosaurus'' and ''Unaysaurus'' valid plateosaurids. In another study, Yates (2003) merged ''Sellosaurus'' into ''Plateosaurus'' (as ''P. gracilis''). In 2011, ''Jaklapallisaurus'', a plateosaurid from India was named. ==Classification== Plateosauridae, which was first named by Othniel Charles Marsh in 1895, is a stem-based taxon and it was defined by Sereno, 1998 as all animals more closely related to ''Plateosaurus engelhardti'' than to ''Massospondylus carinatus''. Galton and Upchurch, 2004 proposed the following definition: all animals more closely related to ''Plateosaurus engelhardti'' than to ''Massospondylus carinatus'' and ''Yunnanosaurus huangi''. Yates, 2007 defined it as all animals more closely related to ''Plateosaurus engelhardti'' than to ''Diplodocus longus''.〔 Recent cladistic analyses suggest that the clade Prosauropoda, which was named by Huene in 1920 and was defined by Sereno, 1998 as all animals more closely related to ''Plateosaurus engelhardti'' than to ''Saltasaurus loricatus'',〔 is a synonym of Plateosauridae as both contain the same taxa.〔〔 ImageSize = width:1200px height:auto barincrement:15px PlotArea = left:10px bottom:50px top:10px right:10px Period = from:1824 till:2100 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:50 start:1824 ScaleMinor = unit:year increment:10 start:1824 TimeAxis = orientation:hor AlignBars = justify Colors = #legends id:CAR 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「plateosauridae」の詳細全文を読む スポンサード リンク
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