TERMINONATATOR PONTEIXENSIS, A NEW ELASMOSAUR (REPTILIA; SAUROPTERYGIA) FROM THE UPPER CRETACEOUS OF SASKATCHEWAN
TERMINONATATOR PONTEIXENSIS, A NEW ELASMOSAUR (REPTILIA; SAUROPTERYGIA) FROM THE UPPER CRETACEOUS OF SASKATCHEWAN
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TERMINONATATOR PONTEIXENSIS，来自萨斯喀彻温省上白垩纪的一种新的板龙类（爬虫类；蜥龙类）
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Tamaki Sato
中科院分区：
文献类型：
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作者：
Tamaki Sato
摘要 一种新的板龙，Terminonatator ponteixensis，gen.等11月，来自加拿大萨斯喀彻温省西南部的上坎帕尼亚熊爪组，是西部内陆最年轻的蛇颈龙之一，也是少数拥有头骨和颅后骨详细骨学信息的蛇颈龙之一。头骨包括内耳腔的上侧和脑壳顶部的中间部分。该类群与其他板龙类的区别在于板龙类中多种不同的骨学特征的组合，以及高而尖的冠突的独特特征。异常骨化可见于融合或叉状胃、掌骨结节的形成以及肢体愈合的骨折。将脑壳的背部部分与其他蛇颈龙类进行比较，显示出蛇颈龙脑壳形态的变化。根据最近关于中足同源性的争论，对腕骨和跗骨元素的同一性进行了检查。
Abstract A new elasmosaur, Terminonatator ponteixensis, gen. et sp. nov., from the Upper Campanian Bearpaw Formation of southwestern Saskatchewan, Canada, is one of the youngest plesiosaurs from the Western Interior, and one of the few plesiosaurs for which detailed osteology of both skull and postcrania is available. The skull includes the upper side of the inner ear cavity and a median portion of the roof of the braincase. This taxon is distinguished from other elasmosaurs by a combination of several osteological characters variable among elasmosaurs, as well as the unique feature of a high and pointed coronoid process. Anomalous ossification is seen in the fused or pronged gastralia, development of tubercules in metacarpals, and healed fracture of the limb. The dorsal portion of the braincase is compared with other plesiosaurs, showing a variation in plesiosaur braincase morphology. Identity of carpal and tarsal elements is examined based on recent debates on the homology of mesopodials.