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J4 ›› 2010, Vol. 16 ›› Issue (3): 309-316.

• 古生物学 • 上一篇    下一篇

贵州剑河寒武系清虚洞组掘头虫类三叶虫的发现

 杨兴莲, 赵元龙, 彭进, 杨宇宁, 杨凯迪   

  1. 1. 贵州大学 资源与环境工程学院,贵阳 550003;
    2. 现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京 210008
  • 收稿日期:2010-03-26 修回日期:2010-05-12 出版日期:2010-09-20 发布日期:2010-09-20
  • 作者简介:杨兴莲,女,博士、副教授,从事地层古生物研究;E-mail:yangxinglian2002@163.com
  • 基金资助:

      国家自然科学基金(40902003,40672018);国家重点基础研究发展计划(2006CB806401);贵州省科技特别基金项目(黔科机
    字2007-4004);中国地层表及说明书的编制项目

Discovery of Oryctocephalid Trilobites from the Tsinghsutung Formation
(Duyunian Stage, Qiandongian Series, Cambrian), Jianhe County,
Guizhou Province

YANG Xin-Lian, ZHAO Yuan-Long, PENG Jin, YANG Yu-Ning, YANG Kai-Di   

  1.  1. College of Resource and Environment, Guizhou University, Guiyang 550003, China; 2. State Key Laboratory of Palaeobiology and
    Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China 
  • Received:2010-03-26 Revised:2010-05-12 Online:2010-09-20 Published:2010-09-20

摘要:

贵州剑河八郎寒武系黔东统清虚洞组由泥岩和灰岩组成,厚约300 m,沉积相属于黔东陆棚深水过渡相区沉积类
型,不同于黔西以浅水台地相白云岩和灰岩为主的典型清虚洞组类型。该组三叶虫化石丰富,包括莱德利基虫目Redlichia
(Redlichia) guizhouensis,R.(R.) nobilis;褶颊虫目对沟虫科Eoptychoparia  jinshaensis,Antagmus dapingensis,褶颊虫科
Nangaops brevis;耸棒头虫目叉尾虫科Olenoides hupeiensis, Kootenia sp.,以及掘头虫类中的掘冠虫科Ovatoryctocara sp.,掘头虫
科Changaspis elongata,C. cf. elongata和飞龙山虫科 Duyunaspis cf. duyunensis;共计9属7种2相似种及2未定种。本文描述
了其中具重要地层意义的掘头虫类三叶虫3属4种,包括2未定种。结果表明,在黔东清虚洞组发现的掘头虫类Changaspis
elongata和Duyunaspis cf. duyunensis,此前仅报道于该组之下的杷榔组,现这两种的层位可上延至清虚洞组上部;同时显示
该组Ovatoryctocara sp.和凯里组下部的Ovatoryctocara granulata比较相似,有可能是Ovatoryctocara granulata的祖先种。掘头
虫类三叶虫的新资料将有助于促进国际寒武系第3统底界层型剖面及点位(GSSP)的进一步研究。

关键词: 清虚洞组, 掘头虫类三叶虫, 寒武系, 贵州

Abstract:

The Tsinghsutung Formation near Balang village, Jianhe County, Guizhou Province, belonging to the eastern Guizhou
lithozone,  is more  than 300 m  in  thickness and mainly composed of dark grey  thin bedded  limestones and mudstones, which
is different  from  the  light grey  thick bedded dolostones and  limestones in  the western Guizhou  lithozone. The upper part of  the
formation is rich in trilobites, including 9 genera, 7 species, 2 conformis species and 2 indefinite species, i.e. Redlichia (Redlichia)
guizhouensis, R.  (R.) nobilis, Eoptychoparia  jinshaensis, Antagmus dapingensis, Nangaops brevis, Olenoides hupeiensis, Kootenia
sp.,  Ovatoryctocara sp., Changaspis elongata, C. cf. elongata and Duyunaspis cf. duyunensis, of which Redlichia and Antagmidae
are most common and  typical of  the Redlichia  (R.) guizhouensis-Redlichia  (R.) nobilis Acme Zone  in  the upper part of  the
Tsinghsutung Formation. The oryctocephalid trilobites Changaspis elongate and Duyunaspis cf. duyunensis formerly reported from
the underlying Balang Formation are described for the first time in this paper from the upper part of the Tsinghsutung Formation.Moreover, Ovatoryctocara sp., a form closely similar to Ovatoryctocara granulata from the overlying beds (lower part of the Kaili
Formation) may  likely be an ancestral species of O. granulata. The new discovery of  the oryctocephalid  trilobites  is  therefore
significant for the further work on the global boundary stratotype section and point (GSSP) for the base of Cambrian Series 3

Key words:  Tsinghsutung Formation, oryctocephalid trilobites, Cambrian, Guizhou Province

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