Neuroanatomy of the ankylosaurid dinosaurs Tarchia teresae and Talarurus plicatospineus from the Upper Cretaceous of Mongolia, with comments on endocranial variability among ankylosaurs.
Neuroanatomy of the ankylosaurid dinosaurs Tarchia teresae and Talarurus plicatospineus from the Upper Cretaceous of Mongolia, with comments on endocranial variability among ankylosaurs.
复制标题
蒙古上白垩纪甲龙恐龙 Tarchia teresae 和 Talarurus plicatospineus 的神经解剖学，以及对甲龙的颅内变异的评论。
DOI：
10.1016/j.palaeo.2017.11.030
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
P.
中科院分区：
文献类型：
--
作者：
Paulina-Carabajal;A.;Lee;Y.;Kobayashi;Y.;Lee;H.;and Currie;P.
甲龙的颅脑和颅腔形态尚不清楚。此外，颅骨内模到目前为止只被描述了不到十个分类群。完整的内耳形态已知的只有三种——乌图斯真头龙、昆巴拉瑟龙和坎贝尔pawpawsaurus。本文首次报道了蒙古白垩纪甲龙、多翼龙和龟尾龙的颅骨内腔形态。这些蒙古分类群的古神经学特征的研究为这两个物种增加了新的解剖学信息，使其能够与北美的甲龙类进行首次比较。小脑小叶的发育在前庭隆起留下印记——小叶小叶隐窝——在euoplocephalus， talarurusus和t.t eresae中被观察到。由于这种结构尚未在任何结龙类中发现，因此它在甲龙颅骨内模中的存在可能代表了一种可能的突触形态，具有未知的古生物意义。
Ankylosaur braincase and endocranial morphologies are poorly known. Furthermore, cranial endocasts have been described for fewer than ten taxa so far. The complete inner ear morphology is known for only three species –Euoplocephalus tutus,Kunbarrasaurus ieversi, andPawpawsaurus campbelli. Here, the first cranial endocast morphologies are presented for the Mongolian Cretaceous ankylosauridsTalarurus plicatospineusandTarchia teresae. The study of paleoneurological features of these Mongolian taxa adds novel anatomical information to both species allowing the first comparison with ankylosaurids from North America. The development of a cerebellar flocculus that leaves an impression on the vestibular eminence – floccular recess – is observed inEuoplocephalus,TalarurusandT.teresae. Because this structure hasn't been identified in any nodosaurid so far, its presence in ankylosaurid cranial endocasts may represent a possible synapomorphy with unknown paleobiological implications.