Kalcit采石场碳酸盐岩岸化石:中新世刺状类浅海生物侵蚀新认识捷克共和国)

IF 0.8 4区 地球科学 Q4 PALEONTOLOGY Ichnos-An International Journal for Plant and Animal Traces Pub Date : 2021-06-18 DOI:10.1080/10420940.2021.1915781
Jaroslav Šamánek, R. Mikuláš, L. Hájková
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引用次数: 1

摘要

布尔诺附近Kalcit采石场的中新世化石岩海岸线保存完好。它不同于少数保存下来的中央帕拉提斯的同时期海岸线,主要是由棘足类动物造成的无聊。这些钻孔由大致光滑的浅圆形坑表示,解释为棘足类动物的居住痕迹。在鱼类分类学上,它们可归入鱼种Circolites kotoucensis Mikuláš, 1992。除了通常的单个凹坑外,还发现了两种可识别的复合凹坑:(1)由光滑的接缝底部连接的线性凹坑链;(2)螺旋状折叠的凹坑,类似蔷薇花。线性链在形态上与Planavolites homolensis Mikuláš(1992)和Ericichnus bromleyi Santos and Mayoral(2015)非常相似。这种相似性表明,有必要对迄今为止所描述的所有归于单调棘皮类的卵属,即Circolites、Ericichnus和Planavolites的诊断进行回顾。我们建议,底部光滑的线状或平面痕迹应该被认为是邻近环状岩的复合,前提是在平面图中仍然可以看到单个坑的遗迹。Ericichnus现在被认为是Planavolites的初级同义词Mikuláš, 1992。
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A fossil carbonate rocky shore in the Kalcit Quarry: a new insight into echinoid shallow marine bioerosion (Miocene; Czech Republic)
ABSTRACT A Miocene fossil rocky coastline is well preserved in Kalcit Quarry near Brno. It differs from the few preserved coeval coastlines of the Central Paratethys in the dominance of borings attributable to echinoids. These borings are represented by roughly smooth shallow circular pits interpreted as dwelling traces of echinoids. Ichnotaxonomically, they can be placed in the ichnospecies Circolites kotoucensis Mikuláš, 1992. Besides usual individual pits, two discernible varieties of composite Circolites were found: (1) linear chains of pits interconnected by a smoothed joint bottom; and (2) spirally folded pits resembling a rosacean flower. The linear chains are morphologically very similar to narrow forms of Planavolites homolensis Mikuláš, 1992 and to Ericichnus bromleyi Santos and Mayoral, 2015. This similarity demonstrates the necessity of a review of the diagnoses of all the hitherto described ichnogenera attributed to boring echinoids, i.e., Circolites, Ericichnus, and Planavolites. We suggest that linear or planar traces with smoothed bottoms should be considered a composite of neighbouring Circolites, provided that the remains of individual pits are still discernible in the ground plan. Ericichnus is now considered as junior synonym of Planavolites Mikuláš, 1992.
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来源期刊
CiteScore
2.50
自引率
12.50%
发文量
0
审稿时长
>12 weeks
期刊介绍: The foremost aim of Ichnos is to promote excellence in ichnologic research. Primary emphases center upon the ethologic and ecologic significance of tracemaking organisms; organism-substrate interrelationships; and the role of biogenic processes in environmental reconstruction, sediment dynamics, sequence or event stratigraphy, biogeochemistry, and sedimentary diagenesis. Each contribution rests upon a firm taxonomic foundation, although papers dealing solely with systematics and nomenclature may have less priority than those dealing with conceptual and interpretive aspects of ichnology. Contributions from biologists and geologists are equally welcome. The format for Ichnos is designed to accommodate several types of manuscripts, including Research Articles (comprehensive articles dealing with original, fundamental research in ichnology), and Short Communications (short, succinct papers treating certain aspects of the history of ichnology, book reviews, news and notes, or invited comments dealing with current or contentious issues). The large page size and two-column format lend flexibility to the design of tables and illustrations. Thorough but timely reviews and rapid publication of manuscripts are integral parts of the process.
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