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Systematics and biostratigraphy of the superfamily Archaediscacea (Carboniferous Foraminifer)

古生菌总科（石炭有孔虫）的系统学和生物地层学

基本信息

批准号：
07640620
负责人：
UENO Katsumi
金额：
$ 1.54万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

In the Japanese Carboniferous, the following archaediscacean genera are recognized : Viseidiscus, Planoarchaediscus, Archaediscus, Paraarchaediscus, Planospirodiscus, Neoarchaediscus, and Asteroarchaediscus. Archaediscacean faunal changes have been observed at two horizons close to the V3b/V3c and Mid-Carboniferous boundaries. Another faunal change among aechaediscaceans is presumed at the Middle/Upper Visean boundary according to the data from central Iran and several references. The first aechaediscacean fauna which was flourished during the Early and Middle Visean includes the subfamilies planoarchaediscinae and kasachstanodiscinae such as Viseidiscus, Planoarchaediscus, Glomodiscus, and Uralodiscus ; the second one observed in the Upper Visean is composed mainly of Archaediscus and Paraarchaediscus as well as several earlier archaediscascan genera mentioned above ; the third one thriving in the latest Visean and Serpukhovian consists of Neoarchaediscus and Asteroarchaediscus togeth … More er with Paraarchaediscus, Archaediscus, and Planospirodiscus. In Bashkirian and Moscovian time, few archaediscaceans belonging to Archaediscus, Neoarchaediscus, Asteroarchaediscus, and others were observed.Most of the archaedicacean genera were cosmopolitan during Visean and early Serpukhovian time. In late Serpulhovian and later, some genera such as Eosigmoilina and Brenckleina having sigmoidal coiling tend to have paleobiogeographically restricted distribution. These genera are very rare in the Eastem Tethys and Panthalassa provinces (no representative of these genera has been reported in the Japanese Carboniferous). Moreover, archaediscacean occurrence becomes sparse in Bashkirian and later. During that time, their distribution tend to be restricted in and around the Russian Platform. These are caused by the reduction and closure of the Circum-equatrial Seaway between Laurasia and Gondwana Continents occurred. in the late Serpukhovian time (formation of the Pangea), which enabled free interchange among the shallow-marine tropical and subtropical faunas in the equatrial zone. It has resulted in controlling the distribution and migration of the shallow-marine, equatrial faunas, and in increasing their provincialism. Less

在日本石炭纪，以下古盘纲属被确认：Viseidiscus，Planoarchaediscus，Archaediscus，Paraarchaediscus，Planospiridiscus，Neoarchaediscus和Asteroarchaediscus。在靠近V3 b/V3 c和中石炭纪边界的两个层位观察到了古盘动物群的变化。根据伊朗中部的数据和几篇参考文献，推测中/上维西亚边界处存在着刺盘动物群的另一个变化。第一批在早、中期维宪世繁盛的Aechaediscacea动物群包括Planoarchaediscinae和Kasachstanodiscinae亚科，如Viseidiscus、Planoarchaediscus、Glomodiscus和Uralodiscus，第二批在上维宪世主要由Archaediscus和Paraarchaediscus以及上述几个早期的Archaediscans属组成;第三类是新古盘菌属和星古盘菌属， ...更多信息与拟古盘菌属、古盘菌属和Planospiridiscus属的关系。在巴什基尔和莫斯科时期，考古盘类中只有少数属于Archaediscus、Neoarchaediscus、Asteroarchaediscus等的古盘类，而在维仙和早期Serpukhovian时期，大多数古盘类属都是世界性的。在Serpulhovian晚期及以后，一些属如Eosigmoilina和Brenckleina具有S形卷曲倾向于具有古生物地理限制分布。这些属在东特提斯和泛地中海地区非常罕见（在日本石炭纪没有报道过这些属的代表）。此外，在巴什基尔语和更晚的时期，古盘纲的出现变得稀少。在此期间，它们的分布往往受到俄罗斯地台及其周围地区的限制。这些都是由劳亚大陆和冈瓦纳大陆之间的环赤道海道的减少和关闭所造成的。在谢尔普霍夫晚期（盘古大陆的形成），这使得浅海热带和亚热带动物群在赤道带之间能够自由交换。它控制了浅海、赤道动物群的分布和迁移，并增加了它们的地方性。少