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IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios Pub Date : 2022-02-01 DOI:10.1016/j.geobios.2021.10.001

Daniel Vachard , Ioan I. Bucur , Axel Munnecke

引用次数: 2

摘要

藻属Vitinellopsis 11 . gen在瑞典哥特兰岛志留纪石灰岩中有很好的代表。这一新分类群被解释为钙化的珊瑚藻(蓝藻门，苔藓门)。在所研究的材料中，亮晶方解石的钙质壁，可能原来是文石，似乎保存得很好。近圆柱形菌体，末端圆形，很少分叉，可达27毫米长，2.5毫米宽。髓质区有4-6个纵向、微妙起伏的虹吸管;皮层下区显示膨大的囊泡状径向虹吸管，皮层区显示小的、相对较短的巨噬虹吸管。讨论了Vitinelleae nomen novum部落(原Bothryelleae)的地位。鉴于其丰富、易于识别和地层范围短，golandica nov. gen.， nov. sp. Vitinellopsis可能对区域对比、相和古生物地理研究有用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Vitinellopsis nov. gen., a new calcareous alga (Chlorophyta, Bryopsidales) from the Silurian of Gotland (Sweden), and the tribe Vitinelleae nov. nom

The algal genus Vitinellopsis nov. gen. is well represented in the Silurian limestones of Gotland (Sweden). This new taxon is interpreted as a calcified codiacean alga (Chlorophyta, Bryopsidales). In the studied material, the calcareous wall of sparry calcite, probably originally aragonitic, appears well preserved. The subcylindrical thallus, with rounded ends, rarely bifurcated, measures up to 27 mm long and 2.5 mm wide. The medullar zone exhibits 4–6 longitudinal, subtly undulating siphons; the subcortical zone shows inflated, vesiculiform radial siphons, and the cortical zone displays small, relatively short acrophorous siphons. The status of the tribe Vitinelleae nomen novum, formerly Bothryelleae, is discussed. Given its abundance, ease of identification, and short stratigraphic range, Vitinellopsis gotlandica nov. gen., nov. sp. may prove useful for regional correlations, facies and paleobiogeographic studies.

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来源期刊

Geobios 地学-古生物学

CiteScore

3.30

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.