A5067802085- Fossil Insects in Amber
- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Hymenoptera taxonomy and phylogeny
- Advanced X-ray Imaging Techniques
- Medical Imaging Techniques and Applications
- Coleoptera Taxonomy and Distribution
- Evolution and Paleontology Studies
- Advanced X-ray and CT Imaging
- Amphibian and Reptile Biology
- Species Distribution and Climate Change
- Paleontology and Evolutionary Biology
- Ecology and Vegetation Dynamics Studies
- Lepidoptera: Biology and Taxonomy
- Adhesion, Friction, and Surface Interactions
- Cell Image Analysis Techniques
- Morphological variations and asymmetry
- Insect and Pesticide Research
- Computer Graphics and Visualization Techniques
- Scarabaeidae Beetle Taxonomy and Biogeography
- Freshwater macroinvertebrate diversity and ecology
- Forest Insect Ecology and Management
- Neurobiology and Insect Physiology Research
- Virtual Reality Applications and Impacts
- Molecular Biology Techniques and Applications
Karlsruhe Institute of Technology
2016-2025
Kerntechnische Entsorgung Karlsruhe (Germany)
2024
Deutsches Elektronen-Synchrotron DESY
2023
Stanford Synchrotron Radiation Lightsource
2021
Technical University of Darmstadt
2017
Heinrich Heine University Düsseldorf
2011-2015
State Museum of Natural History Karlsruhe
2011-2015
American Museum of Natural History
2010
Abstract We present Biomedisa, a free and easy-to-use open-source online platform developed for semi-automatic segmentation of large volumetric images. The is based on smart interpolation sparsely pre-segmented slices taking into account the complete underlying image data. Biomedisa particularly valuable when little priori knowledge available, e.g. dense annotation training data deep neural network. accessible through web browser requires no complex tedious configuration software model...
Indirect X-ray detectors are of outstanding importance for high resolution imaging, especially at synchrotron light sources: while consisting mostly components which widely commercially available, they allow a broad range applications in terms the energy employed, radiation dose to detector, data acquisition rate and spatial resolving power. Frequently, an indirect detector consists thin-film single crystal scintillator high-resolution visible microscope as well camera. In this article,...
Significance X-ray microtomography is a well-established tool to study the three-dimensional morphology of static biological samples. To capture motion in living specimen real time, movies projections are frequently used. However, resulting loss information about third spatial dimension has limited applicability such acquisition protocols. Now, by combining ultrafast and sophisticated analysis, we developed cine-tomography as visualize internal dynamics nontranslucent millimeter-sized...
Abstract With nearly 100,000 species, the Acercaria (lice, plant lices, thrips, bugs) including number of economically important species is one most successful insect lineages. However, its phylogeny and evolution mouthparts among other issues remain debatable. Here new methods preparation permitted comprehensive anatomical description inclusions from mid-Cretaceous Burmese amber in astonishing detail. These “missing links” fossils, attributed to a order Permopsocida, provide crucial...
The extraordinary success of social insects is partially based on division labour, i.e. individuals exclusively or preferentially perform specific tasks. Task preference may correlate with morphological adaptations so implying task specialization, but the extent such specialization can be difficult to determine. Here, we demonstrate how physical foundation some tasks leveraged quantitatively link morphology and performance. We study allometry bite force capacity in
Digital surface mesh models based on segmented datasets have become an integral part of studies animal anatomy and functional morphology; usually, they are published as static images, movies or interactive PDF files. We demonstrate the use animated 3D embedded in documents, which combine advantages both movie interactivity, example preserved Trigonopterus weevils. The method is particularly suitable to simulate joints with largely deterministic movements due precise form closure. illustrate...
ABSTRACT Fossils provide unique opportunity to understand the tempo and mode of evolution are essential for modeling history lineage diversification. Here, we interrogate Mesozoic fossil record Aculeata, with emphasis on ants (Formicidae), conduct an extended series ancestral state estimation exercises distributions tip-dated combined-evidence phylogenies. We developed illustrated from ground-up a 576 morphological characters which scored 144 extant 431 taxa, including all families...
One key event in insect evolution was the development of mandibles with two joints, which allowed powerful biting but restricted their movement to a single degree freedom. These define Dicondylia, constitute over 99% all extant species. It common doctrine that dicondylic articulation chewing remained unaltered for more than 400 million years. We report highly modified overcoming restrictions freedom and hypothesize major role diversification. are defining features parasitoid chalcid wasps,...
Here we describe a new specimen of Archaeopteryx sp. from the lower Tithonian Mörnsheim Formation in Franconian Alb Bavaria, Germany. This fossil is third avialan found this formation. The skeleton comprises right forelimb and shoulder as well fragments left both hind limbs. lengths humerus ulna are most similar to those Munich . Despite having been massively altered by late diagenesis, it can be referred sp., based on morphology furcula, coracoid, radius, manual ungual, which nests within...
Here we describe a new specimen of Archaeopteryx sp. from the lower Tithonian Mörnsheim Formation in Franconian Alb Bavaria, Germany. This fossil is third avialan found this formation. The skeleton comprises right forelimb and shoulder as well fragments left both hind limbs. lengths humerus ulna are most similar to those Munich . Despite having been massively altered by late diagenesis, it can be referred sp., based on morphology furcula, coracoid, radius, manual ungual, which nests within...
Primary and secondary sexual characters of Mesostigmata are often used in species descriptions phylogenetic analyses. The use these has been focused almost exclusively on external structures. Digital 3D reconstruction based synchrotron X-ray microtomography (SR-μCT) data allowed a comparative investigation the structure an internal system, female genital atrium, mite lineage Uropodina (Parasitiformes: Mesostigmata). Despite substantial variability observed structures, general model for...
The coxa-trochanteral joints on the legs of weevil Trigonopterus oblongus (Pascoe) work as a biological screw-and-nut system. apical portions coxae closely resemble nuts with well-defined inner threads covering 345°. corresponding trochanters have perfectly compatible external spiral 410°.
The female and egg of the new Papuan leaf insect Phyllium (Phyllium) riedeli n. sp. are described illustrated. species belongs in siccifolium species-group subgenus and, with a body length 56.3 mm, represents smallest so far for genus. type-specimens stored State Museum Natural History Karlsruhe, Germany (SMNK). A checklist key is provided New Guinean representatives Illiger, 1798.
Two new species of the parasitic wasp genus Mesocentrus Szépligeti (Betylobraconinae) are described. One based on a from Papua New Guinea, other first Palaearctic member subfamily 30+ mya, Baltic amber. The second is illustrated using synchrotron X-ray microtomography. Whereas extant Betylobraconinae restricted to Australia, Guinea and Caledonia, their ancestral distribution now known have extended considerably further. A key four provided. Both possess some putatively plesiomorphic...
Abstract About 50% of all animal species are considered parasites. The linkage diversity to a parasitic lifestyle is especially evident in the insect order Hymenoptera. However, fossil evidence for host–parasitoid interactions extremely rare, rendering hypotheses on evolution parasitism assumptive. Here, using high-throughput synchrotron X-ray microtomography, we examine 1510 phosphatized fly pupae from Paleogene France and identify 55 parasitation events by four wasp species, providing...
High-resolution, three-dimensional (3D) imaging of soft tissues requires the solution two inverse problems: phase retrieval and reconstruction 3D image from a tomographic stack two-dimensional (2D) projections. The number projections per should be small to accommodate fast tomography rapid processes constrain X-ray radiation dose optimal levels either increase duration in vivo time-lapse series at given goal for spatial resolution and/or conservation structure under irradiation. In pursuing...
Industrial biocatalysis plays an important role in the development of a sustainable economy, as enzymes can be used to synthesize enormous range complex molecules under environmentally friendly conditions. To further develop field, intensive research is being conducted on process technologies for continuous flow order immobilize large quantities enzyme biocatalysts microstructured reactors conditions that are gentle possible realize efficient material conversions. Here, monodisperse foams...
Abstract Structural colours in living organisms have been observed and analysed a large number of species, however the study how micro- nano-scopic natural structures responsible such colourations develop has largely ignored. Understanding interplay between chemical composition, structural morphology on multiple length scales, mechanical constraints requires range investigation tools able to capture different aspects hierarchical architectures. Here, we report developmental most widespread...
The male genitalia of insects are among the most variable, complex, and informative character systems for evolutionary analysis taxonomic purposes. Because these general properties, many generations systematists have struggled to develop a theory homology alignment parts. This struggle continues present day, where fundamentally different models nomenclatures Hymenoptera, example, applied. Here, we take multimodal approach digitalize comprehensively document genital skeletomuscular anatomy...
Dinosaurs undoubtedly produced huge quantities of excrements. But who cleaned up after them? Dung beetles and flies with rapid development were rare during most the Mesozoic. Candidates for these duties are extinct cockroaches (Blattulidae), whose temporal range is associated herbivorous dinosaurs. An opportunity to test this hypothesis arises from coprolites some extent extruded an immature cockroach preserved in amber Lebanon, studied using synchrotron X-ray microtomography. 1.06% their...