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雪松山龙属

雪松山龙属
化石时期:早白垩纪巴列姆阶
雪松山龙的左肠骨
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: 雪松山龙属 Cedrorestes
Gilpin et al., 2007
模式种
克氏雪松山龙
Cedrorestes crichtoni

Gilpin et al., 2007

雪松山龙属(学名:Cedrorestes)可能是种基底鸭嘴龙超科恐龙,生存于早白垩纪犹他州。 属名意为“雪松山脉的居民”,是以化石发现地雪松山脉组为名。化石是个不完整的骨骸,年代为巴列姆阶

发现与历史

雪松山龙的正模标本(编号DMNH 47994)是一个不完整的骨骸,包含:肋骨碎片、一个荐骨、左肠骨、部分右肠骨、右股骨、第三左跖骨、骨化肌腱的碎片。正模标本发现于犹他州东南部,雪松山脉组的顶层(Yellow Cat段)。化石散布于钙质泥岩中,并有在泥土覆盖前因气候或践踏而破坏的迹象[1]

雪松山龙与其他禽龙类的差别在于,同时具有类似禽龙近亲的高肠骨,以及许多鸭嘴龙科的特征,例如髋臼上后侧,以及坐骨关节表面都具有大型骨质突。David Gilpin与其同事在叙述雪松山龙时,根据这些鸭嘴龙科特有的骨质突[1][2],认为牠们是禽龙科与鸭嘴龙科的中间型动物。David Gilpin与其同事将雪松山龙列为已知最早的鸭嘴龙科[1]

属名是以化石发现地雪松山脉组为名,cedrus拉丁语意为“雪松”,oros古希腊文意为“山脉”,-etes则意为“居民”。种名crichtoni是以科幻小说麦可·克莱顿(Michael Crichton)为名,他是小说《侏罗纪公园》(Jurassic Park)与《失落的世界》(The Lost World)的作者[1]

古生态学与古生物学

雪松山脉组因为许多的恐龙化石而著名,包含:虚骨龙类内德科尔伯特龙驰龙科犹他盗龙腕龙科雪松龙、以及甲龙科加斯顿龙[3]

雪松山龙可能是基底鸭嘴龙科,或是衍化的禽龙类(非鸭嘴龙科)。牠们是种大型植食性恐龙,能够以二足或四足方式行走[4][5]。从雪松山龙的臀部构造,可知牠们具有类似鸭嘴龙科的腿部肌肉,但是目前尚不清楚禽龙类与鸭嘴龙科间的腿部肌肉变化,以及所造成的影响[1]。需要更多的化石,才能理解雪松山龙的古生物学特征。

参考资料

  1. ^ 1.0 1.1 1.2 1.3 1.4 Gilpin, David; DiCroce, Tony; and Carpenter, Kenneth. A possible new basal hadrosaur from the Lower Cretaceous Cedar Mountain Formation of eastern Utah. Carpenter, K. (ed.) (编). Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs. Bloomington and Indianapolis: Indiana University Press. 2007: 79–89. ISBN 0-253-34817-X. 
  2. ^ Weishampel, David B.; and Horner, Jack R. Hadrosauridae. Weishampel, David B.; Osmólska, Halszka; and Dodson, Peter (eds.) (编). The Dinosauria 1st. Berkeley: University of California Press. 1990: 534–561. ISBN 0-520-06727-4. 
  3. ^ Weishampel, David B.; Barrett, Paul M.; Coria, Rodolfo A.; Le Loeuff, Jean; Xu Xing; Zhao Xijin; Sahni, Ashok; Gomani, Elizabeth, M.P.; and Noto, Christopher R. Dinosaur Distribution. Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.) (编). The Dinosauria 2nd. Berkeley: University of California Press. 2004: 517-606. ISBN 0-520-24209-2. 
  4. ^ Horner, John R.; Weishampel, David B.; and Forster, Catherine A. (2004). "Hadrosauridae". The Dinosauria, 2nd edition. 438–463.
  5. ^ Norman, David B. Basal Iguanodontia. Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.) (编). The Dinosauria 2nd. Berkeley: University of California Press. 2004: 413–437. ISBN 0-520-24209-2. 

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雪松山龙属
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