Planktonic organic matter in surficial sediments of the Banda Sea (Indonesia) : a palynological approach

The acid resistant microscopic organic matter preserved in marine sediments (palynofacies) represents a small fraction of marine and terrestrial biomass that escaped rapid degradation and recycling to the atmospheric and hydrospheric carbon reservoirs. Palynofacies consists of (1) organic microfossils (palynomorphs), (2) fragments of larger organic structures (palynodebris), and (3) degradation products of both debris and palynomorphs (diffuse organic aggregates). Palynofacies composition is biologically, chemically and physically determined by the combined selective effects of (1) qualitative and quantitative composition of source biomass, (2) chemical preservation potential of individual biomacromolecular structures in organic remains during sedimentation and diagenesis, and (3) a wide variety of external chemical and physical conditions, such as water currents, sedimentation rate, oxygen level, and temperature. Complementary to biogeochemical analysis, the palynological analysis of organic matter constituents from (sub)recent sediment samples can provide insight in (1) the biological affinity of individual palynofacies categories, and (2) the influence of differential sorting and differential degradation on palynofacies composition

Chitinous palynomorphs and palynodebris representing crustacean exoskeleton remains from sediments of the Banda Sea (Indonesia)

Palynological residues from surface sediments in the Banda Sea (Indonesia) are characterised by the presence of chitinous palynomorph types that can be correlated with exoskeletons of crustaceans, notably calanoid copepods. A series of 27 palynomorph types are described and informally categorised. Also the quantitatively prominent transparent palynodebris and its diffuse degradation products are derived from crustaceans. Selective preservation of the chitinous remains is considered to be related to the effects of high plankton production and high sedimentation rate

Catalogue of the Mesozoic and Cenozoic holotypes in the collection of plant fossils in the Nationaal Natuurhistorisch Museum, Leiden

This is an inventory of the Mesozoic and Cenozoic type material in the original palaeobotanical collections of the Nationaal Natuurhistorisch Museum, Leiden, The Netherlands. In total 60 holotypes are documented and one is noted as missing from the collections. One new combination is made (Cinnamomum javanicum (Goeppert) nov. comb.) and several species are considered to be conspecific

Composition and palaeogeographic position of the Early Permian Jambi flora from Sumatra

A preliminary taxonomic revision of the Early Permian Jambi flora results in a lower number of taxa, a number of new determinations and several new combinations (Dicranophyllum molle (Jongmans & Gothan) comb. nov., Oligocarpia posthumii (Jongmans & Gothan) nov. comb., Callipteridium strictinervis (Jongmans & Gothan) comb. nov.). Cones containing the bicuspidate seeds Tobleria bicuspis are recorded for the first time. The exact stratigraphic position of the Jambi flora is unknown, but brachiopods and fusulinids indicate an Early Permian age. Comparisons with the East Asian Permian floras of the Cathaysian realm indicate that the Jambi palaeoflora can best be compared to a relatively xeric Cathaysian flora, possibly indicative of relatively high latitude

Macrofloral remains from the Lower Cretaceous of the Leiva region (Colombia)

Lower Cretaceous plant fossils are described systematically from marine deposits near Villa de Leiva (Boyaca region, Colombia). Specimens originating from the same localities kept at the Florida Museum of Natural History (Gainesville) were included in the systematic description. The plant fossils belong to the Pteridophyta, the Cycadophyta, the Coniferophyta, and to taxa of uncertain affinity which, following previous authors, are referred to the angiosperms. Two new species of Coniferophyta are described, viz. Cupressinocladus hoedemaekeri sp. nov. and Brachyphyllum winklerprinsii sp. nov. Also, Thuites sutamarchensis Huertas is transferred to the genus Cupressinocladus. Fossil plants, Lower Cretaceous, Leiva Region, Colombia

Carboniferous plant fossils from northern Turkey in the Jongmans Collection, Naturalis, Leiden

The Jongmans Collection in Naturalis, Leiden, the Netherlands, is an internationally important resource of paleobotanical data that includes over 4000 Carboniferous plant fossils from northern Turkey. It was the result of two field excursions by Jongmans in Turkey during 1938 and 1946, and includes specimens collected by him, and specimens donated to him by Turkish, Swiss, and Austrian colleagues. Although not comprehensive, it is the most important source of data for the study of Carboniferous vegetation dynamics and biostratigraphy in the easternmost part of Variscan Euramerica. This in turn is vital for understanding how the progressive collapse of the Euramerican wetland biome started in the Early Moscovian, a vegetation change that coincided with the onset of a marked global climatic warming. © 2017, Pleiades Publishing, Ltd

De keuze voor en de consequentie van het instellen van hoger beroep

In discussies over effectiviteit, efficiëntie en kwaliteit van rechtspraak is het hoger beroep steevast onderwerp van gesprek. Wat zijn de motieven van partijen om al dan niet in hoger beroep te gaan? En hoe tevreden zijn ze over de procedure in hoger beroep? De Raad voor de rechtspraak heeft het laten onderzoeken. (Rapport 'Motieven voor en waardering van hoger beroep'