The test wall of ?Nubeculina Cushman 1924 (Miliolida): updates on its agglutinated-porcelaneous wall structure from entire and sectioned specimens

IF 1.3 4区 地球科学 Q3 PALEONTOLOGY
L. Capotondi, M. Kaminski, N. Mancin
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引用次数: 1

Abstract

There is a growing number of new foraminifera with agglutinated wall types held together by secreted crystallites of high-magnesium calcite that do not fit within the traditional definition of the Miliolida. In this study, we analyzed entire and sectioned foraminiferal specimens frommodern marine sediments collected off the Croatian coast (Adriatic Sea) using an Environmental Scanning Electron Microscope (ESEM) equipped with Energy-Dispersive x-ray-Spectroscopy (EDS). The investigated specimens resemble the miliolid genera Nubeculina Cushman 1924 and Falsonubeculina Amao and Kaminski 2019, but display characteristics of testmorphology and an agglutinated-porcelaneous wall structure that have not been previously observed in similar miliolids. Their wall structure is more like that observed in primitive agglutinated foraminifera such as Lagenammina rather than in true miliolids. New taxonomical inferences regarding the nubeculinid group of genera are discussed.
Nubeculina Cushman 1924 (milolida)的试验壁:从整个和切片标本中更新其粘合瓷质壁结构
有越来越多的新的有孔虫,它们的壁类型是由分泌的高镁方解石晶体结合在一起的,这与传统的千孔虫的定义不一致。在这项研究中,我们使用配备能量色散x射线光谱(EDS)的环境扫描电子显微镜(ESEM)分析了克罗地亚海岸(亚得里亚海)收集的现代海洋沉积物中的整个和切片有孔虫标本。所研究的标本类似于百万虫属Nubeculina Cushman 1924和Falsonubeculina Amao和Kaminski 2019,但显示出先前在类似百万虫中未观察到的测试形态学特征和粘连-陶瓷壁结构。它们的壁结构更像在原始凝集有孔虫(如Lagenammina)中观察到的,而不是在真正的千粒虫中观察到的。讨论了关于核仁属群的新的分类学推论。
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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来源期刊
Micropaleontology
Micropaleontology 地学-古生物学
CiteScore
3.20
自引率
6.70%
发文量
18
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. Owned by The Micropalaeontological Society, the scope of the journal is broad, demonstrating the application of microfossils to solving broad geoscience issues.
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