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江西晚白垩世大型兽脚类恐龙牙齿
2015-01-12 | 编辑: | 【

作者:莫进尤,徐  星


摘要:描述了江西晚白垩世南雄组产出的两颗大型兽脚类恐龙牙齿。这两颗牙齿的齿冠高度分别为91和76 mm左右。较小牙齿近似圆锥形,齿冠基部比率为0.72, 与典型的暴龙类牙齿相似。较大牙齿横向侧扁,齿冠基部比率约为0.47, 舌侧和唇侧表面近乎平坦,前后缘冠面基部发育明显的纵向褶皱,区别于已发现的暴龙科、鲨齿龙科和棘龙科成员的牙齿。江西大型兽脚类恐龙牙齿的发现对于全面了解华南地区南雄组多样化的脊椎动物群组成具有一定的意义。
关键词:江西,晚白垩世,南雄组,兽脚类,牙齿

卷期:第53卷,第1期

 

 

Large theropod teeth from the Upper Cretaceous of Jiangxi, southern China

 

MO Jin-You, XU Xing

 

Abstract  Two isolated, large theropod teeth from the Upper Cretaceous Nanxiong Formation of Nankang County, Jiangxi Province, southern China, are described. Their crown heights (CH) are 76 and 91 mm, respectively. The smaller tooth is referable to the Tyrannosauridae based on its size and sub-oval cross-section (the crown base ratio (CBR) is about 0.72). The larger tooth is moderately laterally compressed (the CBR is about 0.47), with well defined longitudinal oriented enamel wrinkles at the basal halves of the mesial and distal margins, probably represents a previously unknown large theropod inhabited Asia during the Late Cretaceous. The recovered large theropod teeth add to the known diversity of vertebrates from the Upper Cretaceous Nanxiong Formation, southern China.

Key words  Nankang, Jiangxi, Upper Cretaceous, Nanxiong Formation, Theropoda, tooth

 

 
附件
Large theropod teeth from the Upper Cretaceous of Jiangxi, southern China
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