北格陵兰岛西部(劳伦西亚)志留纪早期Sphenothallus(刺胞目)的巢壳

IF 1.2 4区地球科学 Q2 GEOLOGY Gff Pub Date : 2021-10-02 DOI:10.1080/11035897.2021.1979642

J. S. Peel

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引用次数: 5

摘要

摘要描述了北格陵兰华盛顿地志留纪早期（Llandovery系列）管状cnidarian鞘翅目化石保存完好的固着物和早期生长阶段。固定器的直径由连接到基底的基底盘的形成来确定，在基底盘上形成最初的圆锥形但随后的管状壳体。当最初的圆形管获得椭圆形形状时，在每个角边缘处形成了特征性的相对纵向增厚。

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Holdfasts of Sphenothallus (Cnidaria) from the early Silurian of western North Greenland (Laurentia)

ABSTRACT Well-preserved holdfasts and early growth stages of the tubular cnidarian Sphenothallus are described from the early Silurian (Llandovery Series) of Washington Land, North Greenland. The diameter of the holdfast is determined by the formation of a basal disc attached to the substrate, upon which the initially conical, but subsequently tubular shell is formed. The characteristic opposing longitudinal thickenings are developed at each angular margin as the initially circular tube acquires an elliptical form.

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来源期刊

Gff 地学-地质学

CiteScore

2.80

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： GFF is the journal of the Geological Society of Sweden. It is an international scientific journal that publishes papers in English covering the whole field of geology and palaeontology, i.e. petrology, mineralogy, stratigraphy, systematic palaeontology, palaeogeography, historical geology and Quaternary geology. Systematic descriptions of fossils, minerals and rocks are an important part of GFF''s publishing record. Papers on regional or local geology should deal with Balto-Scandian or Northern European geology, or with geologically related areas. Papers on geophysics, geochemistry, biogeochemistry, climatology and hydrology should have a geological context. Descriptions of new methods (analytical, instrumental or numerical), should be relevant to the broad scope of the journal. Review articles are welcome, and may be solicited occasionally. Thematic issues are also possible.