Search publications of the members of the Royal Belgian institute of natural Sciences
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Diagenetic history of Westphalian A and B fluvio-deltaic deposits: an example from the KB206 Peer borehole (Campine Basin, NE-Belgium)
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Stratigraphy and cyclic nature of Lower Westphalian deposits in the boreholes KB174 and KB206 in the Belgian Campine
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Fossielhoudende rivierafzettingen en moeraskleien uit de Mombeekvallei bij Wimmertingen
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Pijpvormige vuurstenen van de Holsteen.
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X-ray computerized tomography study of heterogenities in Westphalian A&B coal strata (Peer coalbed methane project; Campine Basin, NE Belgium).
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La Mer de Barents
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Confirmation de la présence de Sceliphron curvatum (Smith, 1870) en Belgique (Insecta: Hymenoptera: Sphecidae)
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Characterization, Comparative Analysis and Phylogenetic Implications of Mitogenomes of Fulgoridae (Hemiptera: Fulgoromorpha)
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Robber flies from mangroves in Hong Kong (Diptera: Asilidae)
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Ontogeny of the jaws of monogonont rotifers: the malleate trophi of Rhinoglena and Proalides (Ploima, Epiphanidae)
- Information on the embryonic development of the malleate trophi in Epiphanidae (Rotifera, Monogononta, Ploima) is presented, based on scanning electron microscopy observations in Rhinoglena fertoeensis, R. frontalis, R. kutikovae, R. tokioensis, and Proalides tentaculatus, to contribute to the understanding of this structure of high evolutionary and functional relevance in Rotifera. The first observable and distinctly sclerotized structures were a double row of median transversal sclerites along the longitudinal axis, wherein the future unci, rostellar scleropili, cristae rami, and basal apophyses became recognizable. Fulcrum and manubria arose subsequently; the fulcrum sclerites were longitudinally ordered in a double layer. The rami chambers developed last as lamellar structures. Unci appeared as separate thin, elongate elements, the primary uncini, developing to uncus plates by transversal growth and apposition of sclerite material on the shafts of the uncini. The heads of the uncini showed their greatest development after fusion of their shafts into uncus plates. The interjacent spaces between the heads functioned as a mold, organizing bundles of sclerites which developed into the uniseriate, zigzag-shaped cristae rami. The fulcrum attained its definite shape by elongation of the double layer of rod-shaped sclerites into appressed sclerofibrillae. Manubria became visible as a proximal ridge of sclerites, whereupon a triangular lamella composed of crisscross-oriented sclerites developed distally, growing out to the manubrial chambers. Ramus chambers originated from two longitudinal amorphous lamellae incorporating the median rami sclerites and closing from distal to proximal; subbasal chambers were formed before the basal chambers.
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The genus Rhinoglena (Rotifera, Monogononta, Ephiphanidae) in North America, with the description of two new species
- Based on material from aquatic habitats in the northern Chihuahuan Desert and a literature review, we present an account on the occurrence of genus Rhinoglena in North America. Two new species are described, and the presence of Rhinoglena frontalis in the USA is confirmed. Of the two new species, R. texana n. sp. is a close relative of R. frontalis, whereas R. ovigera n. sp. is unique by being oviparous, in contrast to all other Rhinoglena which are viviparous. This prompts a revision of the generic diagnosis of Rhinoglena to accommodate the new species. An identification key to the known species of the genus is provided.
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The influence of environmental variables on freshwater rotifers of the family Brachionidae and Lecanidae in Thailand
- This study investigates the influence of limnological parameters that are known to influence rotifer species richness and composition in temperate areas on two families of monogonont rotifers in a tropical area. We analysed species richness and diversity of the two families from 133 samples taken from several habitat types in Thailand. Coordinates, elevation, pH, temperature, conductivity, salinity and dissolved oxygen were measured and their effect on rotifers assessed. A total of 60 species in 5 genera was recorded from the two families. Latitude and temperature had an effect on species richness of Brachionidae. None of the variables affected species richness of Lecanidae, except habitat type, albeit not significantly. Habitat type and conductivity had an effect on species composition of the two families, whereas latitude had an effect only on species composition of Lecanidae. Species richness and composition of the two rotifer families are well documented in Thailand and no or only few additional species are expected. The limnological correlates of rotifer diversity seem to be in part comparable to and in part different from those known from temperate areas, suggesting that there may be general trends in rotifer species richness and composition across different latitudes.
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Genomics in Ostracoda (Crustacea) – novel tools to answer long-standing evolutionary questions.
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Phylogenetic and genomic studies of ancient asexual darwinulid ostracods.
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Invasive Eichhornia crassipes has not acted as Noah’s Ark for South American ostracods (Crustacea) in the Congo River (Africa).
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Mitochondrial genomes of ostracods from the Southern Ocean
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Evolutionary history and phylogeography of Strandesia ostracods from four major Brazilian floodplains.
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Species and speciation in Lake Tanganyika: an ostracod perspective.
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Speciation in Malagasy Lemurs: a review of the genus Lepilemur’s cryptic diversity.
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Field data on the little known and endangered Lepilemur mittermeieri.
