Early Permian bryozoan faunas of the East Gondwana rift system: viewed from a global perspective

该建议旨在研究东冈瓦纳裂谷系早二叠世苔藓动物群。苔藓虫是化石记录中最具代表性的大型无脊椎动物之一，因为大多数物种都有钙质骨骼，并且广泛分布于各种海洋生物群落中。东冈瓦纳裂谷系呈南北走向，古纬度范围为南纬40°至60°，北部（帝汶）为开阔的海洋环境，南部（珀斯盆地）为较为有限的海洋环境。东冈瓦纳裂谷系的盆地记录了早二叠世南半球冰消期的历史，并包含了下二叠世浅海碳酸盐相为主的苔藓虫骨骼，以前得到了非常有限的研究。研究重点是东冈瓦纳裂谷系苔藓虫的分类学研究，并结合岩相学和地球化学方法进行环境重建。预期的研究成果是对早二叠世苔藓虫的生物地理学的新见解，确定东冈瓦纳动物群的分类亲缘关系，与其他冈瓦纳动物群的关系（例如，阿曼动物群）、古特提斯和北方半球动物群。此外，南半球苔藓虫沿着南北梯度分布格局的新见解，跨越20°的古纬度和开放的海洋更有限的海洋条件。古生态学方面的研究将阐明冰期和冰消事件对东冈瓦纳苔藓动物群的发展和分布的影响，并提高其在气候重建中的应用。生物地层分化的动物群范围从接近石炭系-二叠纪边界的昆古尔阶可能会提供新的联系点，以改善相关的全球时间尺度。

This proposal aims to study Lower Permian bryozoan faunas from the East Gondwana rift system. Bryozoans are among the best-represented macroinvertebrates in the fossil record, because of the presence of a calcareous skeleton in the great majority of species and wide distribution in various marine biotopes. The East Gondwana rift system ran north-south with marine conditions present through a palaeolatitudinal range from 40° to ¬60°S and with open-marine conditions in the north (Timor) to more restricted marine conditions in the south (Perth Basin). Basins of the East Gondwana rift system record the history of Southern Hemisphere deglaciation episodes during the Early Permian, and contain Lower Permian shallow-marine carbonate facies dominated by bryozoan skeletons that previously have received very limited study. The main focus of the research will be the taxonomic study on bryozoans from the East Gondwana rift system, accompanied by petrographic and geochemical methods for environmental reconstructions. Expected outcomes of the intended study are new insights into the biogeography of Early Permian bryozoans with identification of taxonomic affinities of the east Gondwanan fauna, relationships to other Gondwanan (e.g., the Oman fauna), Palaeo-Tethyan and Northern Hemisphere faunas. Furthermore, new insights are expected into the distributional patterns of Southern Hemisphere Bryozoa along a north-south gradient spanning 20° of palaeolatitude and open-marine to more restricted marine conditions. Palaeoecological aspects of the study will illuminate the influence of glaciation and deglaciation events on the development and distribution of bryozoan faunas of East Gondwana, and improve their use for climate reconstruction. Biostratigraphic differentiation of faunas ranging from close to the Carboniferous-Permian boundary to the Kungurian may provide new tie points for improved correlation to the global time scale.