澳大利亚型早二叠世腕足动物群在贵州扁平剖面的发现及其科学意义

Discovery of Australia Early Permian Brachiopods Faunas from Bianping Section of Southwestern Guizhou Province,China and It's Significance

文中论述和比较分析了贵州紫云扁平早二叠世碳酸盐岩连续沉积剖面腕足动物群扭月贝目（Strophomenida）、长身贝目（Productida）、石燕贝目（Spiriferida）共9科，21属，14种及7个未定种的特征、性质，认为贵州紫云扁平早二叠世腕足动物群属高分异度、热水或暖水（热带或亚热带）性质动物。它们之中的Licharewiellaapiocallosa（Clarke），Stctozostersp.，Dyschrestiasp.，RetimarginiferaperarataWaterhouse，CallytharrellaKhaliiArchbold，LinoproductusCora（Orbigny）Globiellafoodi（Etheridge），G．flexousa（Waterhouse），Cancrinellasp.，Attenuatellasp.，Trigonotretacf.StokesiKoenig，ElivinabisnainiArchbold＆Thomas，Spiriferellasp.，LatedCallytharreasisArchbold＆Thomas，？Sulci－plicaCrassaClarke，SpireythafredericksiArchbold＆Thomas等与澳大利亚，特别是澳大利亚西部早二叠世的相当属种很相似。它们之间有着密切的亲缘关系。澳大利亚早二叠世上述腕足动物可能来源于华夏特提斯区。并据澳大利亚早二叠世上述腕足动物最新研究成果，对我国沿用过去的上述腕足动物名称术语作了订正。据资料，认为贵州扁平早二叠世上述腕足动物特征与伊朗加亚、巴基斯坦盐岭、阿富汗、中国?

In this paper, the author studied in detail the feature of the Brachiopods fauna including Strophomenida, Ptaluctida and Spiriferida total 9 family, 21 gernera 14 species and 7 indet.species of early Permian from Bianping section in Ziyun county, Guizhou and considered that it belongs to high diversity one lived in warm water in tropical or subtropical area. According to the international biostratigraphic division index with Fusulinids and Brachionds etc. the early Permian in Bianping section can be divided into Artinskian, Sakmarian and Asselian (in descending order). The faunas is chiefly occurred in Asselian and Sakmarian in Bianping section. In the fauna Licharemielia apicallosa (Clarke), Stctozoster sp., Dysearestia sp., Retimarginifera perforata Waterhouse, similar to Austria (Archbold, 1974) Globiella foordi (Etheridge), G. Flexuosa (Waterhouse), Cancrinella sp., Attenuatella sp., Trigonotreta of stokevi Koenig, Elivina bisnaini Archbold and Barkharn, Spirifer-ella sp., Lastispirifer callytharrensis Archbold and Thomas, Sulciplica crassa Clarke, Spirelytha frdericksi Archbold and Thomas etc. are very similar those in early Permian of Australian, especially of western Australian, suggesting that there is affinity relationship between the both and the latter was, therefore, likely to originate from Cathaysia-Tethys province. Based on the Australia latest new study of early Permian, the author has corrected the synonyms of the early Permian Brachiopods used in China. Based on the available information, the early Permian Brachiopods fauna can be correlated with those of early Permian of such as Iran Java, Pakistan Salt Range, Afghanistan, Pamirs, northern slope of Qomolungma Peak of Tibet (Xizang), western part of Mountain Kunlun of Xinjiang Uigur Autonomous Region and Mountain Qilian (Chi-lien) of Gansu (Kansu) province, Northwestem Guangxi, and Thailand, Timor, Australia and Zhesi and Xiujikqinqi of Inner-Mongolia Autonomous Region northward, even Verkhoyan and Kolyma of Northeastern Siberia etc.. The geography distribution of Brachionds mentioned above reflects that during early Permian, there are no distinct boundaries between Laurasia, Tethys and Gondwana and no obvious difference of paleogeography on the globe. During early Permian, the climate changed from cold to warm without prominent difference in temperature and the paleoequator probably was situated in the Tethys sea, and the Bianping and northwestern Guangxi were probably located on or near the paleoequator. The present equator is likely the result of paleoequator moving southward.