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An Ornithomimid (Dinosauria) Bonebed from the Late Cretaceous of Alberta with Implications for the Behavior Classification and Stratigraphy of North American Ornithomimids

机译:一个Ornithomimid(恐龙)Bonebed从阿尔伯塔省的晚白垩世与启示的行为分类与地层北美Ornithomimids的

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摘要

Bonebeds can provide a wealth of anatomical, taphonomic, and ontogenetic information about the specimens preserved within them, and can provide evidence for inferred behavior. The material described here represents the first known bonebed of ornithomimids in North America, and the fourth record of an ornithomimosaur bonebed in the world. Partial skeletons representing three individuals are preserved in this assemblage, each comprising primarily portions of the posterior postcrania (pelvis, hind limbs and tail). All three individuals are morphologically similar, although one is larger in overall size. Given the stratigraphic position of the site, and the morphology of the postcrania, the preserved material represents a taxon from the clade containing Ornithomimus and Struthiomimus. Pedal ungual morphology is examined and found to be too variable to be useful in distinguishing these species taxonomically. This site provides additional evidence of gregarious behavior in ornithomimids and the first probable record of that behavior in North American forms.
机译:骨床可以提供有关保存在其中的标本的大量解剖学,解剖学和本体论信息,并可以提供推断行为的证据。这里描述的材料代表了北美第一个已知的鸟氨酸类动物的骨床,以及世界上第四个兽角龙的骨床记录。代表三个个体的部分骨骼被保存在该组合中,每个骨骼主要包括后颅骨后部的部分(骨盆,后肢和尾巴)。这三个个体在形态上都相似,尽管一个个体的整体大小较大。考虑到该地层的地层位置和后克拉尼亚的形态,所保存的材料代表了含有鸟氨酸和链霉菌素的进化枝中的一个分类单元。检查踏板的脚趾形态,发现其变化太大,无法在分类学上区分这些物种。该站点提供了鸟眼类动物群居行为的其他证据,以及该行为在北美形式中的第一个可能记录。

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