广西大田剖面下泥盆世(pragian)腕足类

IF 1.6 3区 地球科学 Q2 GEOLOGY Rivista Italiana Di Paleontologia E Stratigrafia Pub Date : 2021-01-19 DOI:10.13130/2039-4942/15010
Li Qiao, Bo Chen, S. Shen
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引用次数: 2

摘要

华南地区下泥盆世腕足动物非常稀少,大部分地区由于广西加里东运动的隆升运动而缺乏沉积。本文报道了广西南宁市近郊大田剖面那高岭组12属13种的腕足动物区系。该动物群以小的rhynchonellide和spiriferide种类为主,此外还有chonetidines、strophomenides、atrypides、athyridides等。纳高岭组腕足类层位的早期Pragian年龄受到与其相关的早期Pragian牙形刺Eognathodus sulcatus带的限制。腕足动物群中约33%属为华南特有,因此它们与欧洲、澳大利亚或北美动物群的古生物地理联系并没有提供任何明确的证据。古生态学解释该动物群沉积于早普拉吉世浅、富氧、低至中等能量的潮下古环境,对应BA2 ~ BA3上底栖组合
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LOWER DEVONIAN (PRAGIAN) BRACHIOPODS FROM THE DASHATIAN SECTION, GUANGXI, SOUTH CHINA
Lower Devonian brachiopods in South China are very rare since most areas lack deposits owing to an uplift movement of the Guangxi (Caledonian) Orogeny. In this paper, we describe a brachiopod fauna consisting of 13 species in 12 genera from the Nagaoling Formation at the Dashatian section in the suburb area of the Nanning City, Guangxi, South China. This fauna is dominated by small rhynchonellide and spiriferide species, along with chonetidines, strophomenides, atrypides, athyridides and others. The early Pragian age for the brachiopod-bearing horizons in the Nagaoling Formation is constrained by the associated early Pragian conodonts Eognathodus sulcatus Zone. About 33% genera of the brachiopod fauna are endemic to South China, therefore they do not provide any clear evidence for its paleobiogeographical link to the faunas of Europe, Australia, or North America. This fauna is paleoecologically interpreted as being deposited in a shallow, oxygen-rich, low to moderate energy, subtidal palaeoenvironment in the early Pragian and it corresponds to the benthic assemblage BA2 to upper BA3
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来源期刊
CiteScore
3.60
自引率
4.30%
发文量
28
审稿时长
>12 weeks
期刊介绍: The Rivista Italiana di Paleontologia e Stratigrafia was founded in 1895. It publishes original papers dealing with all fields of paleontology and of stratigraphy, from Italy and the Mediterranean to the Tethys, as well across the globe from China to North America.
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