Biological, preservational and evolutionary aspects of macro- and meiofaunal biota of the Yangtze Platform at the Precambrian-Cambrian transition

前寒武纪-寒武纪过渡时期扬子地台大型和小型动物群的生物学、保存和进化方面

• 批准号: 5338158
• 负责人: Professor Dr. Dieter Waloßek
• 金额: --
• 依托单位: GeoBioshpere Science Centre
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5338158?language=en
• 关键词: Biological; preservational; evolutionary; aspects; macro

Opposing the "Cambrian explosion", the project aims to study the radiation of Metazoa by the analysis of the macrofauna (Maotianshan-Shalefauna) of shallow-water facies from early Cambrian Chengjiang Lagerstätten. We will focus on selected components, such as benthic supposed gastroneuralian predators among Nemathelminthes and Arthropoda and on comparative-morphological and evolutionary aspects and on material from fresh lithologies of similar age and origin, in order to get additional (e.g. organic-cuticular) information. In addition we plan the exploration of meiofaunal fossils ("Orsten"-type faunas) from sedimentary rocks of carbonate and phosphorite facies and of contemporary or older age than the known Chinese lagerstätten. Such ecological and facial settings are present on the Yangtze Platform and are known to continue form the Late Precambrian into the Cambrian in predominantly black shale and phosphorite lithologies. These investigations are expected to yield "primary food chain members" as important, but neglected components of early benthic biota, providing hitherto unknown information on the early evolution of metazoans in shallow-water habitats (carbonate and phosphate mud facies).

针对“寒武纪大爆发”，本项目旨在通过对早寒武世澄江湖浅水相大型底栖动物（茅天山-页岩动物群）的分析，研究后生动物的辐射。我们将集中在选定的组件，如底栖假定gastorneuralian食肉动物之间的线虫和节肢动物和比较形态和进化方面，并从新鲜的岩性相似的年龄和起源的材料，以获得额外的（如有机表皮）的信息。此外，我们还计划从碳酸盐和磷岩相沉积岩中勘探小型动物群化石（“奥斯滕”型动物群），这些化石的年代与已知的中国化石的年代相同或更早。这样的生态和地貌背景存在于扬子地台，并且已知从晚前寒武纪延续到寒武纪，主要是黑色页岩和磷块岩岩性。预计这些调查将发现“初级食物链成员”是早期底栖生物群中重要但被忽视的组成部分，提供有关浅水栖息地（碳酸盐和磷酸盐泥相）后生动物早期进化的迄今为止未知的信息。