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扁臀龙属

扁臀龙属
化石时期:129–125 Ma
下白垩纪
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 蜥形纲 Sauropsida
总目: 恐龙总目 Dinosauria
目: 鸟臀目 Ornithischia
亚目: 鸟脚亚目 Ornithopoda
演化支 禽龙类 Iguanodontia
演化支 橡树龙形态类 Dryomorpha
演化支 直拇指龙类 Ankylopollexia
演化支 硬棘龙类 Styracosterna
属: 扁臀龙属 Planicoxa
DiCroce & Carpenter, 2001
模式种
毒扁臀龙
Planicoxa venenica

DiCroce & Carpenter, 2001
  • 毒扁臀龙 P. venenica DiCroce & Carpenter, 2001
  • 扁平扁臀龙 P. depressa (Gilmore, 1909)

扁臀龙属学名Planicoxa)是禽龙类恐龙的一化石包含来自几头个体的部分骨骼,发现于美国犹他州南达科塔州,地质年代为下白垩纪

模式种毒扁臀龙P. venenica),是在2001年由Tony DiCroce及肯尼思·卡彭特(Kenneth Carpenter)描述、命名的。化石发现于犹他州格兰德县雪松山组Poison Strip Sandstone段。属名意指肠骨的扁平外表,种小名则是来自“Poison”的拉丁文。模式种的化石包含了保存良好的肠骨、股骨胫骨脊椎骨等骨骼。其股骨是典型的鸟脚下目股骨,但肠骨的髋臼后突则很短、水平发展,以与股骨的粗隆部接合。扁臀龙的发现,替雪松山组(巴列姆阶/阿尔比阶)的动物群增添了更多的资料。

第二个种扁平扁臀龙P. depressa),原本是查尔斯·吉尔摩(Charles Gilmore)在1909年命名的扁平弯龙Camptosaurus depressus);在2008年,由卡彭特与Y. Wilson改归类于扁臀龙。化石发现于南达科塔州的拉科塔组(Lakota Formation)。其肠骨的髋臼后突也是水平发展;与模式种的差异是肠骨并非弯曲,髋臼前突较粗,髋臼较浅,肠骨后段较狭窄。化石包含一些脊椎与两个尺骨。拉科塔组发现的其他禽龙科化石,可能属于此种。在2011年,这个种被建立为新属,Osmakasaurus[1]

参考资料

  1. ^ Andrew T. McDonald. The taxonomy of species assigned to Camptosaurus (Dinosauria: Ornithopoda) (PDF). Zootaxa. 2011, 2783: 52–68 [2012-12-24]. (原始内容存档 (PDF)于2012-04-12). 
  • DiCroce, K. and K. Carpenter. 2001. New ornithopod from the Cedar Mountain Formation (Lower Cretaceous) of Eastern Utah. P. 183-196 in Tanke, D. & K. Carpenter (eds.) Mesozoic Vertebrate Life. Indiana University Press, Bloomington. PDF[永久失效链接]
  • Carpenter, K. and Wilson, Y. 2008. A new species of Camptosaurus (Ornithopoda: Dinosauria) from the Morrison Formation (Upper Jurassic) of Dinosaur National Moument, Utah, and a biomechanical analysis of its forelimb. Annals of the Carnegie Museum 76:227-263.

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扁臀龙属
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