摘要
河源盆地晚白垩世东源组发现的霸王龙类牙齿化石估计长度大于10cm。从其大小和形态判断,应为霸王龙类的牙齿。牙齿保存部分稍微弯曲,中部横截面呈微弱的D形。牙齿的釉质非常薄,釉质脱落后暴露出的牙齿部分显示出明显的纵向条纹。牙齿的牙本质厚度在不同方向上变化较大,且牙本质具有明显的分层现象。该牙齿化石的发现,为以后在该区晚白垩世地层中发现霸王龙类骨骼化石提供了确凿的依据。
An incomplete tyrannosaurid tooth with length more than 10cm, which was found from the Late Cretaceous Dongyuan Formation of the Heyuan basin, is reported herein. Judged from the size and morphology of the tooth, it should belong to tyrannosaurid. The preserved portion of the tooth is slightly curved with a weakly D-shaped cross-section near the middle part. The tooth enamel is very thin, and the exposed portion of the tooth displays distinct longitudinal striations. The dentin thickness varies in different directions and bears a distinct delamination phenomenon. The tyrannosaurid tooth provides a solid evidence for the discovery of tyran-nosaurid skeleton from the Late Cretaceous stratum in the near future.
出处
《地质通报》
CAS
CSCD
北大核心
2009年第6期701-704,共4页
Geological Bulletin of China
基金
国家自然科学基金项目(批准号:40872017)
教育部留学回国人员科研启动基金项目
中国地质科学院地质研究所基本科研业务费专项经费项目(批准号:J0703)资助
关键词
霸王龙类牙齿
晚白垩世
河源盆地
广东
Tyrannosaurid tooth
Late Cretaceous
Heyuan basin
Guangdong
