Late Pennsylvanian–Early Triassic conchostracan biostratigraphy: a preliminary approach
Late Pennsylvanian–Early Triassic conchostracan biostratigraphy: a preliminary approach
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DOI：
10.1144/sp450.6
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发表时间：
2016-12
期刊：
影响因子：
--
通讯作者：
J. Schneider;F. Scholze
中科院分区：
文献类型：
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作者：
J. Schneider;F. Scholze
摘要 壳甲虫是晚古生代至现代大陆沉积物中最常见的动物化石群之一。它们的栖息地范围从石炭纪和早二叠世的常年湖泊到季节性普拉亚湖和早二叠世晚期到三叠纪的临时池塘，在那里它们可以大量出现。这一点，加上相对较高的物种形成率，使它们成为理想的引导化石，特别是在化石贫乏的干湿红层中。根据自 20 世纪 80 年代以来从中欧地表露头和井芯收集的材料和数据，提出了初步的壳甲虫分区。我们采用了保守的方法，建立了由两个或三个物种组成的聚集区，而不是只有一种或有时两种形式的物种分布区。集合区域更加坚固，并且为每个划定的时间间隔提供更高的可靠性。经同位素测年的壳甲虫带物种的出现，或同时出现的甲壳甲虫、昆虫带物种和海洋指数化石（如牙形刺和毛细线虫），使我们能够将我们的组合带与海洋标准全球年代地层尺度联系起来。
Abstract Conchostracans are one of the most common fossil animal groups of continental deposits from late Palaeozoic to modern times. Their habitats have ranged from perennial lakes of the Carboniferous and Early Permian to seasonal playa lakes and temporary ponds from the late Early Permian into the Triassic, where they could form mass occurrences. This, together with relatively high speciation rates, makes them ideal guide fossils, especially in otherwise fossil-poor wet and dry red beds. Based on material and data collected since the 1980s from both surface outcrops and well cores in central Europe, a preliminary conchostracan zonation is proposed. We used a conservative approach, erecting assemblage zones comprising two or three species instead of species-range zones with only one or, sometimes, two forms. Assemblage zones are more robust and provide more reliability for each delineated time interval. Isotopically dated occurrences of conchostracan zone species, or co-occurrences of conchostracans, insect zone species and marine index fossils such as conodonts and fusulinids, allow us to correlate our assemblage zones with the marine Standard Global Chronostratigraphic Scale.