A new Early Miocene (Ottnangian) flora of the “Rzehakia Beds” from Brno-Líšeň

Q3 Earth and Planetary Sciences

Fossil Imprint Pub Date : 2022-01-01 DOI:10.37520/fi.2022.010

M. Bubík, N. Doláková, Z. Kvaček, V. Teodoridis

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Abstract

The fossil flora from brackish late Burdigalian (Ottnangian) sediments in Brno-Líšeň (the Czech Republic) contributes to our knowledge of floristic evolution and palaeoclimatic changes in the Western Carpathians. The fossil material investigated for this study comprises fragmentary leaf imprints, few fruits/seeds, and dispersed pollen from a single palynomorph-rich sample. Macro remains include 3 ferns (Osmunda parschlugiana, Salvinia reussii, ?Polypodiaceae gen. et sp. indet.) and 17 angiosperms (e.g., Daphnogene polymorpha, “Parrotia” pristina, Leguminophyllum spp., Podocarpium podocarpum, cf. Engelhardia orsbergensis, Ulmus sp., Schoenoplectiella cf. ragozinii). The palynospectrum comprises 106 taxa, including abundant palaeotropical elements of zonal evergreen forest, i.e., Sapotaceae, Palmae, Engelhardia, Platycarya, Fagaceae, Araliaceae and Cornus-Mastixia, accompanied by arctotertiary elements of deciduous zonal forest (Quercus, Carpinus, Fagus, Carya, Juglans, Tilia, Betula, Parrotia) and deciduous azonal (riparian) forest (e.g., Alnus, Salix, Ulmus). Aquatic plants, algae (Prasinophyceae, Botryococcus) and marine dinoflagellates indicate a marine environment with freshwater impact. Plant taxa possibly representing open areas such as Olea, Celtis, Buxus, Ephedra, Rosaceae and Poaceae are sporadic, as well as conifers of extrazonal forest such as Cedrus, Tsuga, Picea. The studied palynospectrum contains abundant thermophilic elements and does not point to a cooling event, as reported by previous authors from the Polish part of the Carpathian Foredeep.

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来自Brno-Líšeň的“Rzehakia床”的早中新世(Ottnangian)新植物区系

来自Brno-Líšeň(捷克共和国)的半咸晚期burdigian (Ottnangian)沉积物的化石植物群有助于我们了解西喀尔巴阡山脉的植物群演化和古气候变化。本研究调查的化石材料包括破碎的叶片印记，少量的果实/种子，以及来自一个富含花粉形态的样品的分散花粉。大型遗存包括3种蕨类植物(Osmunda parschlugiana, Salvinia reussii， ?Polypodiaceae gen. et sp. indet.)和17种被子植物(如:多形植物，“Parrotia”pristina，豆科植物，Podocarpium podocarpum, cf. Engelhardia orsbergensis, Ulmus sp.， Schoenoplectiella cf. ragozinii)。孢粉光谱包括106个分类群，包括丰富的地带性常绿森林古热带成分，如saptaceae、Palmae、Engelhardia、Platycarya、Fagus、Carya、Juglans、Tilia、Betula、Parrotia)和落叶地带性(河岸)森林(Alnus、Salix、Ulmus)。水生植物、藻类(Prasinophyceae、Botryococcus)和海洋鞭毛藻表明海洋环境受淡水影响。可能代表开阔地区的植物类群为零星分布的，如油橄榄科、石竹科、黄杨科、麻黄科、蔷薇科和禾科，以及地带性森林外的针叶林，如杉木科、杉木科、云杉科。研究的孢粉谱含有丰富的嗜热元素，并不像以前的作者在喀尔巴阡前深的波兰部分所报道的那样，指向一个冷却事件。

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来源期刊

Fossil Imprint Earth and Planetary Sciences-Stratigraphy

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： Fossil Imprint (formerly Acta Musei Nationalis Pragae, Series B – Historia Naturalis) is an international, open access journal, publishing original papers and reviews of any length from all areas of paleontology and related disciplines, such as palaeoanthropology, biostratigraphy, palynology, and archaeobotany/zoology. All taxonomic groups are treated, including plants, invertebrates, vertebrates, microfossils, and ichnofossils, with a special emphasis on terrestrial and post-Palaeozoic marine biota. We encourage the publication of international meetings as well as special thematic issues. The aim of the journal is to spread the scientific knowledge with no restrictions, and to allow access to it to any interested person. Each article includes information about the date of receiving, accepting and issue.