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正股龙属

正骨龙属
化石时期:白垩纪晚期, 72.1–66 Ma
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
科: 鸭嘴龙科 Hadrosauridae
属: 正骨龙属 Orthomerus
Seeley, 1883
模式种
道氏正股龙
Orthomerus dolloi

Seeley, 1883

正股龙属(属名:Orthomerus)意为“笔直的股骨”,是鸭嘴龙科恐龙的一属,生存于晚白垩纪荷兰,可能还有乌克兰。正股龙目前是种研究不多的属,在过去曾与研究较深的沼泽龙合并。

历史

在1883年,著名英国古生物学家哈利·丝莱(Harry Govier Seeley)根据的一个发现于荷兰林堡省的部分幼年骨骸,命名为正股龙Orthomerus)。这些化石发现于晚白垩纪马斯特里赫特阶地层,包含尾椎与一个部分右后腿,哈利·丝莱根据笔直的股骨,而取名牠们为正股龙[1]。这些腿部骨头的长度,约是北美洲亚洲大型鸭嘴龙类的腿部长度的一半,而股骨长度只有50公分[1]

第二个种是卫氏正股龙(O. weberi),是在1945年由Anatoly Nikolaenvich Riabinin根据后腿化石而叙述、命名,这些化石是发现于前苏联乌克兰克里米亚的未命名地层,属于马斯特里赫特阶[2]。特兰西瓦尼亚正股龙(O. transsylvanicus)有时被列为第三个种,其实是沼泽龙模式种,而在阿尔弗雷德·罗默(Alfred Sherwood Romer)的爬行动物研究中被归类于正股龙[3]。但第三个种的归类并没有被普遍接受[4][5]

这两个种都是根据破碎、不特殊的化石而命名,因此被认为是疑名[4][5]。但牠们极可能代表欧洲曾为大型鸭嘴龙科恐龙的活动范围之一。

古生物学

如同其他鸭嘴龙科,正股龙是种可二足、也可四足方式行走的草食性恐龙,嘴部拥有不断生长、替换的牙齿,虽限制了灵活性,但提供了研磨的方式[5]

参考资料

  1. ^ 1.0 1.1 Seeley, Harry Govier. On the dinosaurs from the Maastricht beds. Quarterly Journal of the Geological Society of London. 1883, 39: 246–253. 
  2. ^ Riabinin, Anatoly Nikolaenvich, N. [Dinosaurian remains from the Upper Cretaceous of the Crimea]. Vsesoy. Nauch.-Issledov. Geol. Inst. Matl. Paleontol. Strat. 1945, 4: 4–10 (俄语). 
  3. ^ Romer, Alfred Sherwood. Osteology of the Reptiles. Chicago: University of Chicago Press. 1956: 1–772. ISBN 0-89464985-X. 
  4. ^ 4.0 4.1 Weishampel, David B.; and Horner, Jack R. Hadrosauridae. Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.) (编). The Dinosauria 1st. Berkeley: University of California Press. 1990: 534–561. ISBN 0-520-06727-4. 
  5. ^ 5.0 5.1 5.2 Horner, John R.; Weishampel, David B.; and Forster, Catherine A. Hadrosauridae. Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.) (编). The Dinosauria 2nd. Berkeley: University of California Press. 2004: 438-463. ISBN 0-520-24209-2. 

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正股龙属
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