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Holocene shallow-water foraminiferal assemblages from Zanzibar
Česáková, Klára ; Holcová, Katarína (advisor) ; Chroustová, Markéta (referee)
This thesis builds on the project GAČR 23-05217S, prof. RNDr. Katarína Holcová, Ph.D.,The Fossil seagrass meadows- the neglected Phanerozoic ecosystem: its contribution to the shelf biodiversity and identification in the fossil record. This work consists of two parts, the compilation and the practical part. The compilation focuses on the Foraminifera, their morphology, history, and significance for science. Following the practical part, the shallow-water foraminifera from the tropical part of the Indian Ocean are presented here. In the practical part, I deal with the documentation and analysis of two samples taken from the west coast of the Unguja Island (Zanzibar) from the Zanzibar channel (5.9916858S, 39.1855394E). This locality is from the micropaleontological point of view poorly researched. The main outcome is taxonomical identification and subsequent interpretation of the paleoenvironment based on the determined species. Key words: Foraminifera, Zanzibar, Holocene, seagrass meadows
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Foraminifera and Ostracoda as palaeoenvironmental and biostratigraphical indicators in Upper Cretaceous, Bohemian Cretaceous Basin
Chroustová, Markéta ; Holcová, Katarína (advisor) ; Skupien, Petr (referee) ; Soták, Ján (referee)
This PhD thesis is a commentary to the attached publications. The thesis deals with two microfossil groups Ostracoda and Foraminifera in the Upper Cretaceous of the Bohemian Cretaceous Basin. Contribution of these microfossils for biostratigraphy and application in palaeoenvironmental reconstruction with the modern approach is the main goal of this work. Basic ecology, biogeography and previous work in the Bohemian Cretaceous Basin is included. Studied fossil sites, methods, microfossil preservation and data evaluation are described below. Obtained palaeontological, geochemical and lithological data are interpreted in the context with available data from studied fossil sites. Ostracoda assemblage from Úpohlavy fossil site is correlated with the Ostracoda assemblage from Great Britain. The similarity of the Ostracoda taxa suggests a possible communication of compared areas. Thanks to this work, biostratigraphy occurrence of six Ostracoda species (Cythereloidea stricta, Nemoceratina (Pariceratina) montuosa, Cythereis ornatissima ornatissima, Phodeucythere cuneiformis, Pterygocythereis robusta a Bairdoppilata litorea) is extended to Upper Turonian. Taxonomical changes in studied ostracoda assemblage expressed by PSH hypothesis (Platycopid Signal Hypothesis) support previous palaeoenvironmental...
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