Upper Triassic (Rhaetian) foraminifera belonging to the species Glomospira charoides (Jones & Parker), Gaudryinopsis kelleri (Tappan), G. triadica (Kristan-Tollmann), Ammobaculites zlambachensis Kristan-Tollmann, Verneuilinoides racema (Trifonova), and Trochammina cf. jaunensis Brönnimann & Page were investigated using X-ray micro-computed tomography. Foraminifera were recovered from the drill core CM31 of the 817 Lebăda Vest borehole, located off the coast of Romania on the western Black Sea shelf, from depths of 2623 m to 2625 m. Tomographic data was used to generate digital models, which were then virtually sectioned in desirable ways. The acquired transects can be used for comparison with specimens viewed in thin sections, providing a better connection between specimens recovered from residues and those observed in thin sections using transmitted light microscopy.
The purpose of this study was to identify the ostracod assemblage from a 43 m thick section of the Bizeljsko Formation, which constitutes the middle part of the Upper Miocene Posavje Group. The succession comprises sandstone, siltstone, and marlstone, deposited in a delta front environment. The determined ostracods belong to the families Cyprididae, Cytheridae, Darwinulidae, and Loxoconchidae. In total, 30 species were identified. Additionally, 8 morphotypes were determined at the genus level. The most common genera are Candona, Hemicytheria, and Cyprideis. The assemblage belongs to the Caspiocypris labiata subzone from the upper Pannonian. The ostracod assemblage from the Krško Basin is similar in species composition to Pannonian ostracod assemblages from Croatia and Serbia.
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