波兰东南部鲁佩尔硅藻土中的硅鞭毛虫及其他硅质微化石和化石

Q2 Agricultural and Biological Sciences
I. Kaczmarska, J. Ehrman
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引用次数: 0

摘要

始新世-渐新世过渡是新生代重塑世界海洋的主要阶段之一,伴随着气候、海洋海岸线和环流模式的变化。这为本地生物群的化石化和保存创造了极具挑战性的环境。因此,保存完好的渐新世化石在全球范围内并不多见,在中帕拉特提斯地区也同样罕见。波兰东南部外喀尔巴阡山脉外部单元 Skole Nappe 中保存完好的 Rupelian(始新世早期)硅藻土沉积于中帕拉泰西。在一些样本中,除了硅藻之外,沉积物还含有种类繁多的其他硅化微小化石和化石。在此,我们报告了硅鞭毛虫(5 个属 15 个类群)、2 个轮虫和几种形态的鳞片化石,其中一些化石的分类亲缘关系尚不确定。在硅鞭毛虫中,最常见的是 Corbisema 属(C. triacantha、C. hastata 和 C. apiculata)和 Dictyocha 属(D. clinata 和 D. fibula)的物种。我们还发现了轮虫(Pinaciophora,可能还有 Rabdiophrys)的鳞片,以及通常与硅鞭毛虫一起报道的亲缘关系不明的生物(Clathropyxidella 和 Macrora)的残骸。所有这些类群都是中帕拉特提斯地区的首次报道。硅鞭毛虫的物种组成与其他化石的数据一致。硅鞭毛虫、海洋硅藻和古单胞菌表明这里是一个海相沉积环境。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Silicoflagellates and other siliceous micro- and nannofossils from Rupelian diatomites, southeastern Poland
The Eocene-Oligocene Transition is one of the major stages of the Cenozoic reshaping of the world oceans with associated changes in climate, of ocean coastlines and circulation patterns. This altogether created challenging environments for fossilization and preservation of native biota. Consequently, well preserved Oligocene fossils are infrequent worldwide and just as rare in the Central Paratethys. The well-preserved Rupelian (Early Oligocene) diatomites from the Skole Nappe, the external unit of the Outer Carpathians in southeastern Poland were deposited in the Central Paratethys. In some samples, in addition to diatoms, sediments also contain a great diversity of other silicified micro- and nannofossils. Here we report our findings of silicoflagellates (fifteen taxa from five genera), two rotosphaeridians, and several morphotypes of fossil scales, some of uncertain taxonomic affinity. Among silicoflagellates, the most common are species from genera Corbisema (C. triacantha, C. hastata, and C. apiculata) and Dictyocha (D. clinata and D. fibula). We also recovered scales of rotosphaeridians (Pinaciophora and possibly Rabdiophrys) and remains of organisms of uncertain affinity (Clathropyxidella and Macrora) often reported together with silicoflagellates. All of these taxa are the first reports for the Central Paratethys. Silicoflagellate species composition is consistent with the datums derived from other fossils. Silicoflagellates, marine diatoms and archaeomonads suggest a neritic depositional environment.
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来源期刊
Plant and Fungal Systematics
Plant and Fungal Systematics Agricultural and Biological Sciences-Plant Science
CiteScore
2.40
自引率
0.00%
发文量
2
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