Braincase evolution in suchian archosaurs (Reptilia: Diapsida):: evidence from the rauisuchian Batrachotomus kupferzellensis
Braincase evolution in suchian archosaurs (Reptilia: Diapsida):: evidence from the rauisuchian Batrachotomus kupferzellensis
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DOI：
10.1046/j.1096-3642.2002.00025.x
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发表时间：
2002-09-01
影响因子：
2.8
通讯作者：
Gower, DJ
中科院分区：
文献类型：
--
作者：
Gower, DJ
描述了德国中三叠世的一具几乎完整的龙龙（Batrachotomus kupferzellensis Gower）颅骨的骨学特征。可能有离散性外生骨化，散裂裂未被骨分开（即有一个散裂孔），耳囊内侧壁大部分骨化，颈内动脉脑支进入棘旁骨外表面，在舌下神经外孔后方的枕外和枕基上，棘腹侧支比强的亚垂直脊更突出。淋巴管周围孔向后远离耳囊。综述了水龙目加利利苏龙、柯氏后苏龙和罗梅利拟苏龙的颅脑形态。对12个始祖类群的27个脑壳特征矩阵进行了分析。最朴素的假设与目前关于始祖类系统发育的正统观点是一致的，除了始祖类与鳄鱼类的关系比任何鳄鱼类都要密切。这一系统发育被用于对现存鳄鱼衍生脑壳特征进化的简要解释。(C) 2002年伦敦林奈学会。
The osteology of an almost complete braincase of the rauisuchian archosaur Batrachotomus kupferzellensis Gower from the Middle Triassic of Germany is described. There is a possibly discrete epiotic ossification, the metotic fissure is undivided by bone (i.e. there is a metotic foramen), the medial wall of the otic capsule is mostly ossified, the cerebral branch of the internal carotid artery entered the lateral surface of the parabasisphenoid, the ventral ramus of the opisthotic is more prominent laterally than a strong subvertical ridge on the exoccipital and basioccipital that lies posterior to the external foramen for the hypoglossal nerve, and the perilymphatic foramen faces away from the otic capsule in a posterior direction. Braincase morphology in the rauisuchians Saurosuchus galilei, Postosuchus kirkpatricki, and Tikisuchus romeri is reviewed. A matrix of 27 braincase characters for 12 archosaurian taxa is analysed. The most parsimonious hypothesis is consistent with the currently orthodox view of archosaurian phylogeny, except in that aetosaurians are more closely related to crocodylomorphs than is any rauisuchian. This phylogeny is used in a brief interpretation of the evolution of derived braincase features present in extant crocodilians. (C) 2002 The Linnean Society of London.