达拉拇指:瑞典达拉那奥陶纪腹足类Pollicina cyathina的壳形态和捕食失败

IF 1.2 4区地球科学 Q2 GEOLOGY

Gff Pub Date : 2020-04-02 DOI:10.1080/11035897.2020.1728374

J. S. Peel

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引用次数: 1

摘要

腹足动物Pollicina cyathina Koken, 1897年，最初建立在瑞典中部Dalarna地区中奥陶世保存不佳的内部模具上，根据Rättvik附近几个地方的额外材料重新描述。修复后的伤口保存在脊椎纲腹足纲的细边缘生长线上，表明硬食性掠食性攻击失败。来自Sjurberg的内霉菌的异常顶端结构可能是由于个体发育后期早期生长阶段的关闭造成的。

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The Dala thumb: shell morphology and failed predation in Pollicina cyathina (Gastropoda) from the Ordovician of Dalarna, Sweden

ABSTRACT The distinctive, tall and slender cyrtoconic shell of the gastropod Pollicina cyathina Koken, 1897, originally established on a poorly preserved internal mould from the Middle Ordovician of the Dalarna region of central Sweden, is redescribed on the basis of additional material from several localities in the vicinity of Rättvik. Repaired injuries preserved in the fine comarginal growth lines of the archinacelloidean gastropod indicate failed durophagous predatory attacks. Unusual apical structures on an internal mould from Sjurberg probably result from closure of the earliest growth stages later in ontogeny.

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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.