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首页> 外文期刊>Palaeontology >Silicified rhynchonelliform brachiopods from the Kuniutan Formation (Darriwilian : Middle Ordovician), Guiyang, South China
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Silicified rhynchonelliform brachiopods from the Kuniutan Formation (Darriwilian : Middle Ordovician), Guiyang, South China

机译：中国贵阳南部库牛滩组（达里维安：中奥陶纪）的硅化菱形壶状腕足动物。

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摘要

A silicified brachiopod fauna from the Middle Ordovician Kuniutan Formation (lower-middle Darriwilian, i.e. uppermost Arenig to lower Llanvirn) at Wudang, Guiyang, central Guizhou, South China, includes abundant specimens of Yangtzeella, Orthambonites and Leptellina together with common Parisorthis, Saucrorthis, rare Anomalorthis?, Hemipronites?, Leptestia? and, significantly, Aporthophyla; associated are rare trilobites, gastropods, crinoids and nautiloids. The Yangtzeella kueiyangensis-Orthambonites delicata Association is defined for this shallow-water, Benthic Assemblage 3, association. This first record of Aporthophyla in South China may indicate a link between South China and the Toquima-Table Head Province, where the Aporthophyla fauna is more typically developed. However, this association is significantly different from the latter in having three endemic genera, Yangtzeella, Saucrorthis and Parisorthis, rare numbers of Aporthophyla and Anomalorthis?, and the absence of many other typical elements of the Aporthophyla fauna. The occurrence of Orthambonites, Hemipronites? and Leptestia? suggests some relationships between South China and the Baltic Platform during the Mid Ordovician. The various brachiopod associations bearing Aporthophyla may be quite different in nature, composition and diversity, and may possess different background palaeobiogeographical signatures. The assemblages containing Aporthophyla in South China, Qaidam, Malaysia, Australia and possibly Tibet are clearly different biogeographically from those associated with the Toquima-Table Head and the Celtic provinces. Two new species, Aporthophyla sinensis sp. nov. and Leptellina orientalis sp. nov. are described.
机译：来自华南贵州中部贵阳市武当市的中奥陶纪库努坦组（下中段达里维利安，即最高的阿雷尼格至下兰维恩）的硅化腕足动物区系，包括大量的扬子藻，直立藤本属和小鞭毛虫标本，以及常见的Parororthis，Saucrorthis，罕见的Anomalorthis ?、 Hemipronites ?、 Leptestia？以及显着的铁木犀;相关的是稀有的三叶虫，腹足动物，海百合和鹦鹉螺。为此浅水底栖动物组合3协会定义了Kuyangyangensis-Orthambonites delicata协会。在华南地区的第一张记录，可能表明华南地区和拓普玛-桌头省之间存在联系，那里的拟南芥属动物比较典型。但是，这种关联与后者的显着不同之处在于，它具有三个特有属，扬子藻，棘皮目和鳞翅目，极少的拟南芥和拟南芥，以及缺少许多其他典型的拟南芥属元素。发生Orthambonites，Hempipronites？和Leptestia？提出了奥陶纪中期华南与波罗的海平台之间的某些关系。带有担子虫的各种腕足动物协会在性质，组成和多样性上可能完全不同，并且可能具有不同的背景古生物地理特征。在华南，柴达木，马来西亚，澳大利亚以及可能在西藏，含有阿奇石藻的组合在生物地理学上明显不同于与托基马台头和凯尔特省有关的组合。两个新种，中华通心粉。十一月和东方细鳞sp。十一月描述。

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