| 美国北卡罗来纳州上三叠统北方阔齿兽(犬齿兽类:横齿兽科)的齿系和牙齿替换(英文) |
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| 引用本文： | 刘俊. 美国北卡罗来纳州上三叠统北方阔齿兽(犬齿兽类:横齿兽科)的齿系和牙齿替换(英文)[J]. 古脊椎动物学报, 2010, 48(3) |
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| 作者姓名： | 刘俊 |
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| 作者单位： | 1. 中国科学院古脊椎动物与古人类研究所,脊椎动物进化系统学重点实验室,北京,100044
2. 美国史密森学会国立自然历史博物馆古生物部,华盛顿特区,20013-7012 |
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| 基金项目： | 中国科学院知识创新工程项目，国家自然科学基金 |
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| 摘 要： | 描述了产自美国北卡罗来纳州上三叠统横齿兽类北方阔齿兽新材料的牙齿。基于牙齿的特征,尤其是犬后齿的形态,这些标本被暂归入杰斐逊北方阔齿兽Boreogomphodon jeffersoni;不过它们的下阔齿型犬后齿前横脊一般有两个而不是3个齿尖。根据牙齿大小、直接替换情况,推测阔齿型齿从后部萌发,从前部脱落。这个类群仅有一代阔齿型犬后齿;至少有一代,可能是两代裂齿型犬后齿。
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| 关 键 词： | 美国北卡罗来纳州 上三叠统 横齿兽科 北方阔齿兽 齿系 |
DENTITION AND TOOTH REPLACEMENT OF BOREOGOMPHODON (CYNODONTIA:TRAVERSODONTIDAE) FROM THE UPPER TRIASSIC OF NORTH CAROLINA,USA |
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| LIU Jun,Hans-Dieter SUES. DENTITION AND TOOTH REPLACEMENT OF BOREOGOMPHODON (CYNODONTIA:TRAVERSODONTIDAE) FROM THE UPPER TRIASSIC OF NORTH CAROLINA,USA[J]. Vertebrata Palasiatica, 2010, 48(3) |
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| Authors: | LIU Jun Hans-Dieter SUES |
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| Affiliation: | LIU Jun1 Hans-Dieter SUES2(1 Key Laboratory of Evolutionary Systematics of Vertebrates,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences Beijing 100044,China )(2 Department of Paleobiology,National Museum of Natural History,Smithsonian Institution Washington D.C. 20013-7012,USA) |
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| Abstract: | The teeth of new specimens of the traversodontid cynodont Boreogomphodon from the Upper Triassic of North Carolina are described. Based on dental features,especially the postcanine morpho-logy,the North Carolina specimens are tentatively referred to Boreogomphodon jeffersoni ,although their lower gomphodont postcanines typically have two rather than three cusps on the anterior transverse ridge. Based on the tooth size,direct replacement on all available specimens,the gomphodont teeth were shed anteriorly an... |
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| Keywords: | North Carolina,USA Upper Triassic Traversodontidae,Boreogomphodon dentition |
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