关于“浙江吉兰泰龙”(“Chilantaisaurus zhejiangensis”)的讨论

Discussion on"Chilantaisaurus zhejiangensis"

“吉兰泰龙”(“Chilantaisaurus”)自1964年首次描述命名以来,长期被认为是异特龙科(Allosauridae)的大型掠食恐龙,包括4个种。但随着研究的深入,这个属被解体。其中,属型种“大水沟吉兰泰龙”(“C.tashuikouensis”)和“西伯利亚吉兰泰龙”(“C.sibiricus”)被归入棘龙类(Spinosauria)或新坚尾龙类(Neotetanurane);“毛儿图吉兰泰龙”(“C.maortuensis”)被归入鲨齿龙类(Carcharodontosaurid),并被重新描述命名为毛儿图侏儒鲨齿龙(Shaochilong maortuensis)。“浙江吉兰泰龙”(“C.zhejiangensis”)是现存唯一的此类恐龙的足部骨骼化石标本,从其尺寸大小推测,这是一种身长约5 m的大中型兽足类恐龙。通过与其他大中型兽足类的同部位骨骼化石进行对比,可见其具备许多兽足类特别是镰刀龙类的共同特征,并非原以为的仅相似于慢龙,也不排除其属于另一种大中型兽足类的可能性。

Since it was first described and named in 1964,the"Chilantaisaurus"has long been considered a large predatory dinosaur of the family Allosauridae,once including four species.But as research progressed,the genus disintegrated.Among them,the type species"C.tashuikouensis"and"C.sibiricus"were classified into Spinosauria or Neotetanurane."C.maortuensis"was placed in the Carcharodontosaurid group and renamed Shaochilong maortuensis.The"C.zhejiangensis"discussed by the author is the only extant foot bone fossil specimen of this type,which is estimated to be a large and medium-sized dinosaur(Theropoda)with a body length of about 5 m.Through the comparison with other large and medium-sized Theropoda fossils of the same site,it can be seen that it has many common characteristics of the Theropoda,especially the Therizinosauria,which is not merely similar to Segnosaurus.Also,the paper does not rule out the possibility that it belongs to another large and medium-sized Theropoda.