欧洲宾夕法尼亚瓦里斯坎时期的大叶报春花属物种(Equisetopsida)--初步回顾

Christopher Cleal
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摘要

在石炭纪晚期和二叠纪早期马尾藻("马尾")叶片的范围内,可以区分出七个化石物种,这些化石以前被归类为 Annularia stellata。生有这种叶片的嫩枝也会产生独特的茎生叶,通常被称为Calamostachys tuberculata。这些叶状物种可通过叶片和轮叶形态进行区分,每个物种都有独特的地理和地层分布范围。该群于鸭绿江晚期首次出现在瓦里斯坎山脉的山内盆地,随后在波尔索夫-阿斯特拉期扩展到低地副煤沼泽。在斯蒂芬纪,该群继续在煤沼避难所繁衍生息,但最终在二叠纪早期消失了。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Large–leaved Annularia species (Equisetopsida) in Pennsylvanian Variscan Euramerica–a Preliminary Review
Seven fossil–species can be distinguished within the range of late Carboniferous and early Permian equisetopsid (“horsetail”) foliage formerly assigned to Annularia stellata. The shoots bearing this foliage also produced distinctive strobili often known as Calamostachys tuberculata. These foliage species can be differentiated by leaf and whorl morphology, and each species has a distinct geographical and stratigraphical range. The group first appeared in the intramontane basins of the Variscan Mountains in the late Duckmantian, and then expanded into the lowland paralic coal swamps in the Bolsovian–Asturian. The group continued to flourish in coal swamp refugia during the Stephanian but eventually disappeared during the early Permian.
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