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首页> 外文期刊>Journal of vertebrate paleontology >The most complete known Neogene Glyptodontidae (Mammalia, Xenarthra, Cingulata) from northern South America: Taxonomic, paleobiogeographic, and phylogenetic implications
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The most complete known Neogene Glyptodontidae (Mammalia, Xenarthra, Cingulata) from northern South America: Taxonomic, paleobiogeographic, and phylogenetic implications

机译:来自南美洲北部的最完整的新近缘新近蛾科(哺乳动物,Xenarthra,Cingulata):分类学,古生物地理学和系统发育意义

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摘要

The knowledge of northern South American Glyptodontidae (Mammalia, Xenarthra, Cingulata) is very scarce compared with that of southern South American taxa, which have been systematically studied since the 19th century. Recently, the northern taxa (originally assigned to the Glyptodontidae Propalaehoplophorinae Asterostemma and Propalaehoplophorus) have been reinterpreted as basal Glyptodontinae, belonging to the new genus Boreostemma. In this contribution, we present and describe the most complete Neogene Glyptodontidae from northern South America (middle Miocene of the Honda Group, La Venta, Colombia), and its main taxonomic, paleobiogeographic, and phylogenetic implications. This new material expands the morphological characterization of B. acostae and corroborates differences compared with Glyptodontidae from Miocene southern South America. A cladistic analysis corroborates the monophyly of the Glyptodontinae, that B. acostae and B. venezolensis being the sister group of the remaining taxa of Glyptodontinae. The traditionally recognized genera (e.g., Glyptodon and Glyptotherium) constitute natural groups. Whereas the Miocene seems to represent a diversification period for Glyptodontidae in southern South America, the recorded taxa in northern South America are restricted with certainty only to the Glyptodontinae Boreostemma.
机译:与自19世纪以来已进行系统研究的南美南部类群相比,南美北部Glyptodontidae(哺乳动物,Xenarthra,Cingulata)的知识非常匮乏。最近,北部分类群(原先被命名为Glyptodontidae Propalaehoplophorinae Asterostemma和Propalaehoplophorus)被重新解释为基础Glyptodontinae,属于新的Boreostemma属。在这项贡献中,我们介绍并描述了南美洲北部(本田集团中新世中期,哥伦比亚拉文塔)最完整的新近角科(Glyptodontidae),及其主要的分类学,古生物地理学和系统发育意义。与来自南美中新世南部的弓形纲科相比,这种新材料扩展了南美白僵菌的形态特征并证实了差异。一项分类分析证实了齿形龙的单科,即古罗马双歧杆菌和委内瑞拉双歧杆菌是齿形龙的其余类群的姊妹群。传统公认的属(例如,Glyptodon和Glyptotherium)构成自然群体。尽管中新世似乎代表了南美洲南部的Glyptodontidae的一个多样化时期,但是南美洲北部的记录的生物分类只可以肯定地局限于Glyptodontinae Boreostemma。

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