|
|
Cenomanian vegetation of the Bohemian Cretaceous Basin
Čepičková, Jana ; Kvaček, Jiří (advisor) ; Teodoridis, Vasilis (referee) ; Spicer, Robert A. (referee)
Cenomanian plant fossils from the Peruc-Korycany Formation of the Bohemian Cretaceous Basin, Czech Republic are described, analysed and their palaeoenvironment is interpreted. Cycad foliage Nilssonia mirovanae Čepičková et J.Kvaček including micromorphology of its cuticle was described. It shows deeply sunken stomatal apparati surrounded by papillae overhanging the stomatal pit. The haplocheilic stomata are arranged in rows. Todziaphyllum saportanum (Velen.) Čepičková et J.Kvaček is a serrate-margined leaf with semicraspedodromous venation. Since the cuticle of this plant fossil has not been preserved, macro-observation is the only method available. Ascarinophyllum pecinovense Čepičková et J.Kvaček is a serrate-margined leaf, having an abaxial cuticle covered by striations, randomly oriented, and radially oriented striations around the stomata. This species shows a combination of laterocytic/laterocyclocytic, stephanocytic-bicyclic, amphibrachyparacytic, less frequently brachyparacytic and holoparacytic stomata, sometimes with T-shaped thickenings of the internal cuticle at the poles. Papillaephyllum labutae Čepičková et J.Kvaček is characterised by leaves with serrate margins. It shows an abaxial cuticle covered by large papillae. Its stomatal apparatus shows a combination of latero-cyclocytic and...
|
guest ::
