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牛头龙属

牛头龙属
化石时期:下白垩纪, 108.5 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
科: 结节龙科 Nodosauridae
属: 牛头龙属 Tatankacephalus
Parsons, W.L., and Parsons, K.M. 2009
模式种
克氏牛头龙
Tatankacephalus cooneyorum

Parsons, W.L., and Parsons, K.M. 2009

牛头龙属(属名:Tatankacephalus)是种原结节龙科恐龙,生存于白垩纪早期的北美洲。化石发现于蒙大拿州惠特兰郡,当地属于Cloverly组,年代为阿普第阶阿尔比阶

模式种克氏牛头龙T. cooneyorum),是在2009年由克里斯登·帕森斯(Kristen Parsons)与William L. Parsons叙述、命名。属名意为“水牛头”,tatanka拉科塔语意为“水牛”,kephale希腊语意为“头”,意指颅骨的形状;种名则是以John Patrick Cooney家庭为名。

正模标本(编号MOR 1073)是一个部分颅骨,缺少口鼻部前端、下颌,完整的颅骨长度约为32公分。除了颅骨以外,还发现一些肋骨皮内成骨、牙齿。这个标本属于一个成年个体[1]

由于这些化石没有变形的迹象,因此与相同地区发现的蜥结龙相比,两者可以轻易的辨别出来。牛头龙的头部呈圆形,具有大型眼窝,颅骨顶端有一个横向的大型棱脊。根据已发现的唯一牙齿,牙齿缺少舌面隆突。目前已发现两个皮内成骨,其中一个完整无损害,长13.7公分,宽11.5公分,内部中空,呈圆锥状。

根据亲缘分支分类法研究,牛头龙是加斯顿龙的近亲。牛头龙的原始特征包含:前上颌骨仍有牙齿、颅骨仍具有侧颞孔(Lateral temporal fenestrae)。

参考资料

  1. ^ Parsons, W.L., and Parsons, K.M. (2009). "A new ankylosaur (Dinosauria: Ankylosauria) from the Lower Cretaceous Cloverly Formation of central Montana". Canadian Journal of Earth Sciences 46(10):721-738. doi: 10.1139/E09-045. full text online页面存档备份,存于互联网档案馆


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牛头龙属
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