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Paleoecology of the Turonian Ostracoda from the Úpohlavy section
Houdková, Markéta ; Kyška Pipík, Radovan (advisor) ; Seko, Michal (referee)
This thesis deals with the class Ostracoda from the Úpohlavy quarry, which is an important paleontological site of the Turonian in the Czech Cretaceous Basin with abundant and well- preserved fauna. Twenty samples from marls and limestones of Jizera and Teplice formation were colected in which 36 marine middle and upper Turonian ostracods species were identified. Ostracods of the studied profile are characterized by gradual increase of species richness and decline of dominance of Cytherella cf. ovata (Roemer, 1840). The lowest diversity is in the Jizera formation and the highest diversity in the Teplice formation. The order Platycopida prevails on the order Podocopida in the Jizera formation, in which percentages of Platycopida is in the range 67-89%, while its percentage in the Teplice formatiion is lower in the range 25-59 %. Using the Platycopida Signal Hypothesis in a sense of Whatley et al. (2003), which compares percentages of Platycopida and Podocopida, a low O2 content in Jizera formation and in the Coprolite bed (monotonous dark marls) of Teplice formation is supposed. This is in accordance with low number of species (5-11 per sample) and with higher TOC content (0.34-0.74 %). With the beginning of limestone and marl sedimentation of the Teplice formation a number of species increases...
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Ostracods from the Czech Creatacous Basin - current state of knowledge and revision of prof. Pokorny collection
Houdková, Markéta ; Pipík, Radovan (advisor) ; Seko, Michal (referee)
The class Ostracoda is a group of microfossils, which is important in cases where other leading fossils are missing. In the paleontological record Ostracods show ecological and paleogeographic conditions or may help determine the age of the sediment. Professor Vladimír Pokorný dealt with Ostracods in the Czech Cretaceous Basin. The main result of this work is a summary of his articles about that. The subclass Podocopa is the most common group. For ostracod determination is necessary detailed knowledge of the morphology and ornamentation of the carapace, so part of the work is about these characters. Key words: Ostracoda, Cretaceous, Czech Cretaceous Basin
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Cretaceous Foraminifera from the Březno section
Hašková, Barbora ; Holcová, Katarína (advisor) ; Tomanová, Pavla (referee)
Thesis is focused on foraminifera from classical Březno section. It describes the basic charakteristics of foraminifera, Czech Cretaceous Basin, Březno section near Louny and history of research of Cretaceous foraminifera in Czech Republic. Taxonomically studied planktonic foraminifera species are from family Heterohelicidae Cushman, 1927, and benthos species are from family Lagenidae Reuss, 1862, Nodosariidae Ehrenberg, 1838, and Vaginulinidae Reuss, 1860. Key words: Foraminifera, Cretaceous, Březno near Louny, Heterohelicidae, Lagenidae, Nodosariidae, Vaginulinidae
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Cretaceous Radiolaria from the Březno section
Müllerová, Petra ; Holcová, Katarína (advisor) ; Vajskebrová, Markéta (referee)
The presented thesis is focused on the Radiolaria of the Czech Cretaceous Basin. The studied material was collected in Březno u Loun and in the Úpohlavy quarry. Biology, ecology and morphology, as well as systematics of the whole group is discussed. An important part of this thesis constitutes of the geological settings of Cretaceous, Czech Cretaceous Basin and both localities. 26 samples from Březno and 24 samples from the Úpohlavy quarry have been studied using several methods with the aim to obtain most numerous and best preserved communities possible. Despite poor preservation of the shells, 9 species have been identified. Several shells have been assigned at least to the genus or order levels. Species of Dictyomitra communis (Squinabol, 1904), Dictyomitra cf. napaensis Pessagno, 1976, Turbocapsula cf. giennensis O'Dogherty, 1994, Novixitus cf. mclaughlini Pessagno, 1977, Stichomitra cf. stocki (Campbell & Clark, 1944), Stichomitra communis Squinabol, 1903, Stichomitra japonica (Nakaseko & Nishimura), in Nakaseko et. al., 1979, Holocryptocanium barbui Dumitrica, 1970, cf. Pseudoaulophacus pargueraensis Pessagno, 1963 and genera of Orbiculiforma, Stichomitra, cf. Cryptamphorella have been reported in the Czech Cretaceous Basin for the first time.
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Radiolaria of the Bohemian Cretaceous Basin
Müllerová, Petra ; Vajskebrová, Markéta (referee) ; Holcová, Katarína (advisor)
The first part of work deals with cell structure, shell morphology, reproduction and nutrition. Also the ecology and systematical subdivision of radiolarians are described here. The systematical subdivision depends on differences in shell morphology of individual forms. The next part is devoted to Cretaceous radiolarians with focus on Cenomanian and Turonian ones, also some examples from several locations around the world is located here. The last part of this work deals with geology of Bohemian Cretaceous Basin, where the study of radiolarians from certain site will continue in master thesis.
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