底栖有孔虫棘骨结构的功能意义:来自罗马尼亚东北部mililolina cristata Millett, 1898 (mililida)的推论

IF 4.1 3区 地球科学 Q1 PALEONTOLOGY
S. Dumitriu, Zofia Dubicka, Viorel Ionesi
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引用次数: 0

摘要

摘要本文介绍了罗马尼亚摩尔达维亚地台西北部FH3P1Rădăuţi岩芯剖面中新世(下萨尔马提亚阶)底栖有孔虫。根据有孔虫组合,weinfer沉积物沉积在浅水中,包括海洋边缘环境,盐度从微咸到正常海洋不等,海平面变化很短,也很小。此外,我们首次在摩尔达维亚平台上描述了一种非常罕见的物种,Miliolina crista Millett,它呈现出特有的棘龙骨。在对采集材料和薄片中观察到的测试形态及其变异性进行详细研究的基础上,我们讨论了这些有孔虫的一些古生态特征。C.crista可能不是一个独特的物种,但更有可能的是,一些粟粒菌类群在新的环境条件下,如更汹涌的水,形成了这样的外骨骼特征。因此,我们的研究将支持以下论点:海底有孔虫棘的功能之一是稳定在高能环境的沙质基质中发现的有孔虫测试。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The functional significance of the spinose keel structure of benthic foraminifera: inferences from Miliolina cristata Millett, 1898 (Miliolida) from northeast Romania
Abstract. The paper presents Miocene (lower Sarmatian) benthic foraminifera from the FH 3 P 1 Rădăuţi Core section from the northwestern part of the Moldavian Platform, Romania. Based on foraminiferal assemblages we infer sediments were deposited in shallow-water, including marine-marginal environments, of varying salinities from brackish to normal marine with some short and rather small sea-level changes. Moreover, we describe for the first time in the Moldavian Platform a very rare species, Miliolina cristata Millett, which presents a characteristic spinose keel. Based on a detailed study of the test morphology and its variability, observed in picked material as well as in thin sections, we discuss some palaeoecological aspects of these foraminifera. M. cristata probably does not constitute a distinctive species, but it is more probable that some miliolid taxa developed such an exoskeletal feature in response to new environmental conditions, such as more turbulent water. Accordingly, our study would support the thesis that one of the functions of the benthic foraminiferal spines is to stabilize foraminiferal tests found in sandy substrates from high-energy environments.
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来源期刊
Journal of Micropalaeontology
Journal of Micropalaeontology 生物-古生物学
CiteScore
4.30
自引率
5.00%
发文量
7
审稿时长
>12 weeks
期刊介绍: The Journal of Micropalaeontology (JM) is an established international journal covering all aspects of microfossils and their application to both applied studies and basic research. In particular we welcome submissions relating to microfossils and their application to palaeoceanography, palaeoclimatology, palaeobiology, evolution, taxonomy, environmental change and molecular phylogeny.
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