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首页> 外文期刊>Journal of Systematic Palaeontology >The Anisian (Middle Triassic) brachiopod fauna from Qingyan, Guizhou, south-western China
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The Anisian (Middle Triassic) brachiopod fauna from Qingyan, Guizhou, south-western China

机译：贵州贵州庆燕市南安田（中间三叠系）塞努亚

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摘要

Like most of the benthos, brachiopods suffered huge losses in biodiversity during the end-Permian extinction and did not fully recover until the Anisian (Middle Triassic). Anisian brachiopod faunas are thus a key clade characterizing the recovered marine ecosystems in the early Mesozoic. Of these, the brachiopod fauna from Qingyan Town in Guizhou Province, south-western China has long been one of the best-known Anisian faunas in the world. The taxonomy of the Qingyan fauna, however, was last studied half a century ago, and thus requires revision. Here we describe 34 species (and subspecies) (including seven undetermined species) assigned to 29 brachiopod genera from the Qingyan Formation from the Leidapo and Wachangpo localities in the Qingyan section. Of these, 11 species are described for the first time from this area. Two new genera: Parabrekia and Caucasorhynchella (= Crurirhynchella Xu & Liu, 1983, a nomen nudum) and seven new species (Angustothyris dagysi, Angustothyris qingyanensis, Koeveskallina bifurcata, Neocyrtina xui, Nudirostralina minuta, ParabreHa yangi and Rutorhynchia? trigonalis) are also erected. The Qingyan brachiopod fauna is characterized by abundant endemic genera (33.3%) and exhibits a weak similarity with several coeval faunas reported from the western Tethys. In addition, faunal affinity analyses of 13 Anisian brachiopod faunas indicate that at least five biogeographical provinces (western Tethys, eastern Tethys, northern Siberia, Himalayas and New Zealand) were present during the Anisian, and the eastern Tethys province included three subprovinces: Yangtze, southern Qilian-western Qinling and central Qinghai. However, most faunas mutually share rather low Jaccard similarity coefficients (＜0.4), except for those in the western Tethys, implying a continuity of the multi-provincial pattern established for Early Triassic brachiopod distributions.
机译：像大多数Benthos一样，Brachiopods在最终二叠纪灭绝期间遭受了巨大的生物多样性损失，直到anisian（中间三叠系）才能完全恢复。因此，Anisian Brachiopod Faunas是一种关键的思工，其特征在于中生代早期的恢复海洋生态系统。其中，贵州庆燕镇的塞努州省南部中国西南部长期以来一直是世界上最着名的Anisian毒蛇之一。然而，清虚动物群的分类是半个世纪前学习的，因此需要修改。在这里，我们将34种（和亚种）（包括七种未确定的物种）分配到Qingyan部分的庆燕和Wachangpo地区的Qingyan形成的29个Brachiopod属。其中，从该地区第一次描述了11种。两个新的属：Parabrekia和Caucasorhynchella（= Crrirhynchella Xu＆Liu，1983，Nomen Nudum）和七种新种（Angustothyris dagyansis，angustothalliny Qingyanensis，Koeveskallina Bifurcata，Nudyrina Xui，Nudirostralina Minuta，Parabreha Yangi和Rutorynchia？Tregonalis 。 Qingyan Brachiopod Fauna的特点是食人的属性丰富（33.3％），与西方特质的几个赛人动物群呈现弱相似之处。此外，在Anisian期间存在至少五个生物地图省（西部的生物地图省（西部Thethys，东部Thethys，Northern，Himalayas和New西西兰，喜马拉雅山和新西兰），包括三个子系统：长江：长江，祁连西部秦岭和青海市中心。然而，大多数动物群体相互共享相当低的Jaccard相似系数（<0.4），除了西方特质中的那些，暗示了为早期三叠系Brachiopod分布建立的多省模式的连续性。

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  • 来源
    《Journal of Systematic Palaeontology》 |2020年第12期|647-701|共55页
  • 作者

    Zhen Guo; Zhong-Qiang Chen; David A. T. Harper;

  • 作者单位

    State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences (Wuhan) Wuhan 430074 PR China;

    State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences (Wuhan) Wuhan 430074 PR China;

    State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences (Wuhan) Wuhan 430074 PR China Palaeoecosystems Group Department of Earth Sciences Durham University Durham DH1 3LE UK;

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  • 关键词

    Brachiopoda; Middle Triassic; recovery; taxonomy; biogeography; South China;

    机译：Brachiopoda;中间三叠纪;恢复;分类;生物地理;华南地区;

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