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Occurrence of the aglaspidid arthropod Beckwithia in the Furongian Guole Konservat-Lagerstatte of South China

机译:在南方富豪野胶Konservat-Lagerstate的富豪圭尔·克朗斯特拉特队的aglaspidid arthropod的发生

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摘要

The Aglaspidida is a major group of Palaeozoic arthropods traditionally regarded as problematic, but whose evolutionary history has attracted renewed attention over the last decade. These efforts have resulted in an improved understanding of various aspects of aglaspidid palaeobiology, including their environmental, geographical and stratigraphical distribution, and phylogenetic relationships. Here, we describe a new weakly biomineralized non-trilobite arthropod from the Furongian Guole Konservat-Lagerstatte (Sandu Formation) in South China that contributes towards a more complete reconstruction of aglaspidid evolution and diversity during the late Cambrian. Beckwithia? gracilis n. sp. resembles the type species B. typa in the possession of a reentrant posterior cephalic margin, general trunk appearance and coarse tuberculation, but differs in having a more slender construction and a homogeneous exoskeletal sculpture. A revision of putative Beckwithia from Australia and Russia argues against their inclusion in this taxon, making the new species the only representative of the genus outside Laurentia. After Aglaspella and Glypharthrus, also from the Guole biota, this is the third aglaspidid genus shared between Laurentia and South China, which supports the hypothesis that some aglaspidids had great dispersal capabilities. (C) 2018 Elsevier Ireland Ltd Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. Published by Elsevier B.V. All rights reserved.
机译:Aglaspidida是一群传统上的古生代节肢动物,传统上被认为是有问题的,但其进化历史在过去十年中引起了重新关注。这些努力导致了对藿香菌学的各个方面的了解,包括它们的环境,地理和地图形分布和系统发育关系。在这里,我们描述了来自南方富豪野胶Konservat-Lagerstatte(Sandu Maildation)的新弱生物矿化非三洛替洛替洛氏节肢动物,这有助于在寒武纪后期的aglaspidid进化和多样性重建。 Beckwithia? gracilis n。 SP。类似于物种B. Typa inspeed instestants后头部头部缘,一般躯干外观和粗糙的结核,但不同于具有更细长的结构和均匀的外骨骼雕塑。从澳大利亚和俄罗斯的推定贝基亚修订争辩于他们在这个分类群体中讨论,使新物种成为劳伦蒂亚以外的唯一代表。在藿香耳和甘露甘露群岛之后,也来自野胶生物脂,这是劳伦蒂亚和华南之间共同分配的第三个Aglaspidid属,这支持一些Aglaspidids具有很大的分散能力。 (c)2018年Elsevier Ireland Ltd Elsevier B.V.和南京地质学研究所和古生物学研究所。 elsevier b.v出版。保留所有权利。

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