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Study of fungi, algae and bryophytes from the Cretaceous of the Bohemian Massif and James Ross Island
Kadlecová, Veronika ; Kvaček, Jiří (advisor) ; Pšenička, Josef (referee)
The objective of this Diploma thesis is study of diversity of Late Cretaceous bryophytes, fungi and algae from selected localities of the Bohemian Massif and James Ross Island. The focus of the study is the most precise taxonomy assessment of the found fossils and comparsion of their diversity in selected localities from the Northern and the Southern hemispheres. The greatest emphasis is focused on bryophytes, but algae and fungi are mentioned as well. Thereare described two species of fungi, compared to recent genera Passalora and Stomiopeltis, one species of algaea ssigned to Phycopeltis, two species of liverworts assigned to Ricciopsis, one species of incertae sedis and two species of mosses assigned to Muscites and Livingstonites from the Bohemian Massif. Additionally, from James Ross Island there are three species of mosses described and assigned to Muscites and Livingstonites.
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Sphenopterid type of true ferns from Carboniferous basins of Czech massive
Frojdová, Jana ; Pšenička, Josef (advisor) ; Kvaček, Jiří (referee) ; Rößler, Ronny (referee)
This thesis deals with the sphenopterid types of ferns from the Czech Carboniferous basins. Thesis is presented as a combination of two published papers in peer-reviewed journals, one manuscript in review and one manuscript ready for submission. The actual text of the thesis is a general introduction with introduction to the study subject of sphenopterid ferns, methodology, studied type collections, terminology and the result of my study. The introduction of the thesis provides a general overview of the ferns and history of their studies. All four papers presented here are focussed on modern redescription, redefinition, emendation and revision of genera Boweria Kidston, Dendraena Němejc, Sturia Němejc. Based on the revision of these genera, following two new genera were established: Kidstoniopteris gen.nov. and Paraszea gen.nov. A new species Boweria nowarudensis has been described during the course of this study. The "whole plant concept" was applied to all studied specimens, which allows to obtain as much information on the ferns morphology, anatomy, and reproductive organs as possible. This was combined with data on in situ spores as well as sedimentological and petrological analyses. The sporangial cells as annulus, stomium and apical cells and in situ spores were described for all genera and...
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Silicified stems of upper Paleozoic plants from the Intra Sudetic and Krkonoše Piedmont basins
Mencl, Václav ; Sakala, Jakub (advisor) ; Pšenička, Josef (referee) ; Florjan, Slawomir (referee)
The late Paleozoic deposits of the Czech Republic are famous for their rich occurence of silicified stems. Despite the fact they have been often described and are well-known among scientists and collectors, their modern evaluation is lacking. This work summarizes results of recent anatomical and paleoenvironmental studies of silicified stems of the Intra Sudetic and Krkonoše Piedmont basins, where are these fossils found very frequently. Based on field research and review of public and private collections, the presence of silicified remnants was proved in several stratigraphic units. Firstly, this work deals with silicified stems of calamitaleans, which are known from the Ploužnice Horizon of the Krkonoše Piedmont Basin, and some gymnosperms. Based on anatomical studies of the secondary xylem and other related features there were found two species of calamitaleans: Arthropitys cf. bistriata and Calamitea striata. Secondly, the more abundant Agathoxylon - type of wood was divided into two groups, which are assigned to cordaitaleans, and conifers. The palaeoenvironmental conditions were partly reconstructed according to sedimentary structures and also according to cordaitaleans - conifers ratio in each wood-bearing layer. Powered by TCPDF (www.tcpdf.org)
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Study of fungi, algae and bryophytes from the Cretaceous of the Bohemian Massif and James Ross Island
Kadlecová, Veronika ; Kvaček, Jiří (advisor) ; Pšenička, Josef (referee)
The objective of this Diploma thesis is study of diversity of Late Cretaceous bryophytes, fungi and algae from selected localities of the Bohemian Massif and James Ross Island. The focus of the study is the most precise taxonomy assessment of the found fossils and comparsion of their diversity in selected localities from the Northern and the Southern hemispheres. The greatest emphasis is focused on bryophytes, but algae and fungi are mentioned as well. Thereare described two species of fungi, compared to recent genera Passalora and Stomiopeltis, one species of algaea ssigned to Phycopeltis, two species of liverworts assigned to Ricciopsis, one species of incertae sedis and two species of mosses assigned to Muscites and Livingstonites from the Bohemian Massif. Additionally, from James Ross Island there are three species of mosses described and assigned to Muscites and Livingstonites.
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Diversity of the upper Silurian flora of Bohemian Massif and its worldwide comparison with coeval localities
Uhlířová, Monika ; Pšenička, Josef (advisor) ; Urfus, Tomáš (referee)
The thesis deals with diversity of the Upper Sillurian (Přídolí) plant assemblage from the Barrandian. Important part constitues a description of plant macrofossils of the Barrandian within this period, which have been previously published. Revision of those fossil plants also includes determination of plant genera and species, their systematic classification and synonyms. Only non-destructive methods were used to study the samples, including observation under a binocular microscope, photographic documentation, camera lucida drawings or drawings according to detailed photographs. For observing, there was used the technique of both immersion of the samples in denatured alcohol and examination of their dry relief in various beam angles. Combination of knowledge from both techniques subsequently enabled to create some objective reconstructions for the macrofossils. Measuring of plant dimensions by using a uniform method of measurement was a constituent part of the description as well. The result of this work is registration of seven previously published samples representing five fossil genera of plants. The genera namely contains Aberlemnia, Baragwanathia, Fusiformitheca, Tenanthosella and Tichavekia. The genus Tenanthosella and the type species Tenanthosella obrhelii are described as new taxa in this...
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Sphenopterid type of true ferns from Carboniferous basins of Czech massive
Frojdová, Jana ; Pšenička, Josef (advisor) ; Kvaček, Jiří (referee) ; Rößler, Ronny (referee)
This thesis deals with the sphenopterid types of ferns from the Czech Carboniferous basins. Thesis is presented as a combination of two published papers in peer-reviewed journals, one manuscript in review and one manuscript ready for submission. The actual text of the thesis is a general introduction with introduction to the study subject of sphenopterid ferns, methodology, studied type collections, terminology and the result of my study. The introduction of the thesis provides a general overview of the ferns and history of their studies. All four papers presented here are focussed on modern redescription, redefinition, emendation and revision of genera Boweria Kidston, Dendraena Němejc, Sturia Němejc. Based on the revision of these genera, following two new genera were established: Kidstoniopteris gen.nov. and Paraszea gen.nov. A new species Boweria nowarudensis has been described during the course of this study. The "whole plant concept" was applied to all studied specimens, which allows to obtain as much information on the ferns morphology, anatomy, and reproductive organs as possible. This was combined with data on in situ spores as well as sedimentological and petrological analyses. The sporangial cells as annulus, stomium and apical cells and in situ spores were described for all genera and...
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Silicified stems of upper Paleozoic plants from the Intra Sudetic and Krkonoše Piedmont basins
Mencl, Václav ; Sakala, Jakub (advisor) ; Pšenička, Josef (referee) ; Florjan, Slawomir (referee)
The late Paleozoic deposits of the Czech Republic are famous for their rich occurence of silicified stems. Despite the fact they have been often described and are well-known among scientists and collectors, their modern evaluation is lacking. This work summarizes results of recent anatomical and paleoenvironmental studies of silicified stems of the Intra Sudetic and Krkonoše Piedmont basins, where are these fossils found very frequently. Based on field research and review of public and private collections, the presence of silicified remnants was proved in several stratigraphic units. Firstly, this work deals with silicified stems of calamitaleans, which are known from the Ploužnice Horizon of the Krkonoše Piedmont Basin, and some gymnosperms. Based on anatomical studies of the secondary xylem and other related features there were found two species of calamitaleans: Arthropitys cf. bistriata and Calamitea striata. Secondly, the more abundant Agathoxylon - type of wood was divided into two groups, which are assigned to cordaitaleans, and conifers. The palaeoenvironmental conditions were partly reconstructed according to sedimentary structures and also according to cordaitaleans - conifers ratio in each wood-bearing layer. Powered by TCPDF (www.tcpdf.org)
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Late Carboniferous silicified wood from the western part of the Kladno-Rakovnik Basin
Holeček, Jakub ; Sakala, Jakub (advisor) ; Pšenička, Josef (referee)
Kladno-Rakovník Basin and especially its western part is well known for its abundant silicified wood, so-called as "araukarity". The occurrence of these fossils is described since the 19th century, however, modern systematic classification is lacking. Araukarity, linked mainly to the Týnec and Líně Formations, are found almost exclusively on the fields, therefore it was difficult to implement any detailed sedimentological conclusions. The Master Thesis is focused on the western part of the Kladno-Rakovník Basin, where large amount of material was discovered. After a detailed xylotomical study of thin sections and polished cross sections, two different types of wood were discerned. First related to the coniferous and cordaite wood, attributable to the of the morphogenus Araucarioxylon and the second one, rather rare and unknown in the western part of the Kladno-Rakovník Basin represents a calamite wood and it is assigned to the morphogenus Arthropitys. I was able to partially confirm Skoček's (1970) theory, that so-called black araukarity are linked to the grey (Kladno and Slaný) formations.
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