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首页> 外文学位 >Uncompressed late Ordovician graptolites from the Cape Phillips Formation of Cornwallis and Truro Islands, Arctic Canada.
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Uncompressed late Ordovician graptolites from the Cape Phillips Formation of Cornwallis and Truro Islands, Arctic Canada.

机译：加拿大康沃尔利斯和特鲁罗群岛的菲利普斯角海岬组未压缩的晚奥陶纪岩体。

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摘要

Late Ordovician graptolites have been extracted from calcareous concretions collected from three sections in the Cape Phillips Formation on Cornwallis and Truro Islands. A total of 9 species, including 2 new species, have been identified, described, classified, and phylogenetically interpreted.;Proximal development patterns E, G, and K were recognized among the species and the astogenetic data were used to infer possible evolutionary relationships for the species. Shared proximal development patterns are viewed as an indication of common descent. The proximal development of Paraorthograptus ex gr. P. pacificus, "Orthograptus" fastigatus, Appendispinograptus supernus, Genus A species 2, and Climacograptus sp. is described for the first time.;Amplexograptus latus is conspecific with Amplexograptus inuiti, thus extending the known range for this species. (Abstract shortened by UMI.);The stratigraphic distribution of the species encompasses the fastigatus and pacificus zones. The fastigatus Zone has been correlated to the prominens Zone of Anticosti Island, providing the first direct graptolite correlation of the Late Ordovician fastigatus Zone strata of Arctic Canada to another area within Canada.
机译：已从康沃尔利斯和特鲁罗群岛的菲利普斯角海岬组三个断层中收集的钙质凝结物中提取了晚奥陶纪的砾岩。一共鉴定，描述，分类和系统发育地鉴定了9个物种，包括2个新物种。;在该物种中识别了近端发育模式E，G和K，并利用了遗传学数据推断了可能的进化关系。该物种。共享的近端发展模式被视为共同下降的迹象。前副胸肌近端发育。 P. pacificus，“ Orthograptus” fastigatus，Appendispinograptus supernus，A属2种和Climacograptus sp.。首次描述。； Amplexograptus latus与Amplexograptus inuiti是同种的，因此扩展了该物种的已知范围。 （该摘要由UMI缩短。）；该物种的地层分布涵盖了剑嘴龙和太平洋带。 Fastigatus区已与Anticosti岛的隆起区相关，提供了加拿大北极地区奥陶纪的fastigatus区地层与加拿大另一个地区的第一个直接笔石相联系。

著录项

  • 作者

    Senior, Sherrill Jean Harriet.;

  • 作者单位

    University of Waterloo (Canada).;

  • 授予单位 University of Waterloo (Canada).;
  • 学科 Paleontology.
  • 学位 M.Sc.
  • 年度 1993
  • 页码 213 p.
  • 总页数 213
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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