| Microstructure and functional morphology of the Early Cambrian problematical fossil Rhombocorniculum |
| |
| 作者姓名： | LI Guoxiang ZHU Maoyan Michael STEINER |
| |
| 作者单位： | Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China,Technische Universitat Sekr.ACK 14, Ackerstrasse 71～76, 13355 Berlin, Berlin, Germany |
| |
| 基金项目： | Supported by the National Natural Science Foundation of China (Grant Nos. 40172002 and 40232020), the Major State Basic Research Development Program of China (Grant No. G2000077700), and the Chinese Academy of Sciences (Grant No. KZCX2-116) |
| |
| 摘 要： | Rhombocorniculum cancellatum from the Lower Cambrian of southern Shaanxi Province (South China) is represented by the dextral and sinistral tooth-like sclerites (both in nearly equal numbers), indicating that the body plan of the organism with these sclerites probably was bilaterian. The main feature of the microstructure of the sclerites is the presence of longitudinally arranged, mutually contiguous hollow tubules, the shared walls consisting of microcrystalline apatite. In transverse cross sections, the sclerite wall mainly exhibits a spongy structure, with pore size decreasing adapically. Functional morphological analysis indicates that the sclerites serve as a defensive rather than a grasping function.
|
| 关 键 词： | Early Cambrian Rhombocorniculum microstructure functional morphology |
Microstructure and functional morphology of the Early Cambrian problematical fossil Rhombocorniculum |
| |
| LI Guoxiang,ZHU Maoyan,Michael STEINER.Microstructure and functional morphology of the Early Cambrian problematical fossil Rhombocorniculum[J].Progress in Natural Science,2003,13(11):831-835. |
| |
| Authors: | LI Guoxiang ZHU Maoyan Michael STEINER |
| |
| Abstract: | Rhombocorniculum cancellatum from the Lower Cambrian of southern Shaanxi Province (South China) is represented by the dextral and sinistral tooth-like sclerites (both in nearly equal numbers), indicating that the body plan of the organism with these sclerites probably was bilaterian. The main feature of the microstructure of the sclerites is the presence of longitudinally arranged, mutually contiguous hollow tubules, the shared walls consisting of microcrystalline apatite. In transverse cross sections, the sclerite wall mainly exhibits a spongy structure, with pore size decreasing adapically. Functional morphological analysis indicates that the sclerites serve as a defensive rather than a grasping function. |
| |
| Keywords: | Early Cambrian Rhombocorniculum microstructure functional morphology |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 |
