Systematics and biostratigraphy of the superfamily Archaediscacea (Carboniferous Foraminifer)

在日本石炭世，可识别出以下古铁饼属：Viseidiscus， Planoarchaediscus, Archaediscus, Paraarchaediscus, Planospirodiscus， Neoarchaediscus和Asteroarchaediscus。在接近V3b/V3c和中石炭世边界的两个层位上观察到古生菌的区系变化。根据伊朗中部的资料和一些参考文献，推测在中上Visean边界有另一种动物区系变化。最早出现于早、中维西时期的aechadediscae动物群包括planoarchaediscae亚科和kasachstanodiscae亚科，如visediscus、Planoarchaediscus、Glomodiscus和Uralodiscus；在上Visean观察到的第二种主要由古铁饼和准古铁饼以及上述几个较早的古铁饼属组成；在最新的Visean和Serpukhovian中繁荣的第三个物种由Neoarchaediscus和Asteroarchaediscus组成，更多的是与Paraarchaediscus， Archaediscus和Planospirodiscus一起。在巴什基利亚和莫斯科时期，很少观察到属于古铁饼、新古铁饼、星形古铁饼等的古铁饼类。大多数太古动物属在Visean和Serpukhovian早期是世界性的。在Serpulhovian晚期及之后，具有s形盘绕的Eosigmoilina和Brenckleina等属的古地理分布往往受到限制。这些属在东特提斯省和Panthalassa省非常罕见（在日本石炭纪未见过这些属的代表）。此外，在巴什基利亚及以后，古discacean的出现变得稀少。在此期间，它们的分布往往被限制在俄罗斯平台内及其周围。这是由于Laurasia和Gondwana大陆之间环赤道海道的减少和关闭造成的。在Serpukhovian时代晚期（泛大陆的形成），这使得赤道带的浅海热带和亚热带动物群之间可以自由交换。它控制了浅海、高原动物的分布和迁移，增加了它们的地方性。少

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