Carboniferous conodont biostratigraphy
Carboniferous conodont biostratigraphy
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DOI：
10.1144/sp512-2020-38
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
J. Barrick;A. Alekseev;S. Blanco-Ferrera;Nataliya V. Goreva;Ke-yi Hu;L. Lambert;T. Nemyrovska;
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文献类型：
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作者：
J. Barrick;A. Alekseev;S. Blanco-Ferrera;Nataliya V. Goreva;Ke-yi Hu;L. Lambert;T. Nemyrovska;
摘要石炭纪牙形刺生物地层学包括反映类群古地理分布的区域分带和明显的浅水和深水牙形刺生物相。一些物种具有全球分布，可以实现高质量的相关性。这些分类群被纳入全球石炭纪年代地层单位的定义中。全球石炭系的标准分带尚未形成。最低的密西西比河相由管水母类物种划分，在浅水相中例外，在那里使用其他多节类动物。Gnathodus物种在图尔奈斯时期辐射，并被用来定义许多密西西比河地区。以短暂属为特征的图尔奈晚期多样性最高，随后是通过Visean和Serpukhoian的Gnathodus种和甲壳动物属的较低多样性动物群。到了Visean和Serpukhoian晚期，Lochriea提供了更好的生物地层分辨率。以洞穴和梅斯托纳萨斯为基础的浅水分区很难相互关联。在宾夕法尼亚纪底附近的一次灭绝事件之后，出现了新的节肢动物属：Rhchistogna，Declinognathodus，Neognathodus，Idiognathoids和Idiognathodus。到莫斯科纪中期，仅存几个属：Idiognathodus、Neognathodus和Swadelina。在卡西莫夫中期和吉赫勒中期，只有Idiognathodus和Streupgnathodus两种常见。在Gzhelian末期，链霉菌物种的再多样化延伸到了Cisurian。
Abstract Carboniferous conodont biostratigraphy comprises regional zonations that reflect the palaeogeographical distribution of taxa and distinct shallow-water and deep-water conodont biofacies. Some species have a global distribution and can effect high quality correlations. These taxa are incorporated into definitions of global Carboniferous chronostratigraphic units. A standard global Carboniferous zonation has not been developed. The lowermost Mississippian is zoned by Siphonodella species, excepet in shallow-water facies, where other polygnathids are used. Gnathodus species radiated during the Tournaisian and are used to define many Mississippian zones. A late Tournaisian maximum in diversity, characterized by short-lived genera, was followed by lower diversity faunas of Gnathodus species and carminate genera through the Visean and Serpukhovian. By the late Visean and Serpukhovian, Lochriea provides better biostratigraphic resolution. Shallow-water zonations based on Cavusgnathus and Mestognathus are difficult to correlate. An extinction event near the base of the Pennsylvanian was followed by the appearance of new gnathodid genera: Rhachistognathus, Declinognathodus, Neognathodus, Idiognathoides and Idiognathodus. By the middle of the Moscovian, few genera remained: Idiognathodus, Neognathodus and Swadelina. During the middle Kasimovian and Gzhelian, only Idiognathodus and Streptognathodus species were common. Near the end of the Gzhelian, a rediversification of Streptognathodus species extended into the Cisuralian.