A5000196761- Amphibian and Reptile Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Species Distribution and Climate Change
- Bat Biology and Ecology Studies
- Aquatic life and conservation
- Primate Behavior and Ecology
- Animal Behavior and Reproduction
- Advanced X-ray Imaging Techniques
- Paleontology and Evolutionary Biology
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Lepidoptera: Biology and Taxonomy
- Turtle Biology and Conservation
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Nuclear Physics and Applications
- Morphological variations and asymmetry
- Animal and Plant Science Education
- Parasite Biology and Host Interactions
- Fossil Insects in Amber
- Pleistocene-Era Hominins and Archaeology
- Connexins and lens biology
- Testicular diseases and treatments
- Advanced MRI Techniques and Applications
Centre National de la Recherche Scientifique
2013-2024
Muséum national d'Histoire naturelle
1997-2024
Mécanismes Adaptatifs et Evolution
2007-2024
Structure et Instabilité des Génomes
2022
Éco-Anthropologie
2009-2021
Université de Poitiers
2010-2019
Institute of Paleoprimatology Human Paleontology Evolution and Paleoenvironments
2010-2019
Centre National pour la Recherche Scientifique et Technique (CNRST)
2015
Institut d'Etudes Politiques de Paris
2015
Université Paris-Sud
2002-2013
We present a method for phase retrieval in propagation-based x-ray imaging, based on the contrast transfer and transport of intensity equation approaches. show that model does not coincide with limit small propagation distances, we derive new alleviates this problem. Using model, devise an algorithm to retrieve from slowly varying samples is valid beyond distances. its utility by imaging three dimensions biological sample causes both strong absorption shift.
Recent molecular phylogenetic studies indicate that the rafting Indian plate harboured several isolated vertebrate lineages between ca. 130 and 56 Myr ago dispersed diversified 'out of Indi' following accretion with Eurasia. A single family amphibian order Gymnophiona, Ichthyophiidae, presently occurs on across much South East Asia. Ichthyophiid phylogeny is investigated in to test competing out India Asia hypotheses for their distribution. Partial sequences mitochondrial 12S 16S rRNA...
Abstract The bony labyrinth provides a proxy for the morphology of inner ear, primary cognitive organ involved in hearing, body perception space, and balance vertebrates. Bony shape variations often are attributed to phylogenetic ecological factors. Here we use three‐dimensional (3D) geometric morphometrics examine patterns variation most species‐rich ecologically diversified traditionally recognized superfamily Carnivora, Musteloidea (e.g. weasels, otters, badgers, red panda, skunks,...
Summary Chameleons are highly specialized and mostly arboreal lizards characterized by a suite of derived characters. The grasping feet tail thought to be related the life-style chameleons. Yet, specializations for trade-off with running ability. Indeed, previous studies have demonstrated between clinging performance faster species being poorer clingers. Here we investigate presence trade-offs measuring in four chameleon belonging two different clades (Chamaeleo Bradypodion). Within each...
Harlequin frogs, genus Atelopus, are a species-rich group of bufonid anurans from the Neotropics with more than 100 species. For nearly four decades now, this has suffered massive population declines. Almost all species threatened extinction, and many populations several considered extinct or possibly extinct. This results in limited sampling available for studies on harlequin frog systematics, especially terms molecular genetic information. However, efficient conservation frogs requires an...
The occlusal morphology of the teeth is mostly determined by enamel-dentine junction morphology; plays role a primer and conditions formation enamel reliefs. However, accretion cap yields thickness variations that alter topography enamel–dentine (i.e., differential deposition ameloblasts create an external surface does not necessarily perfectly parallel junction). This self-reliant influence on tooth poorly understood still under-investigated. Studies considering relationship between dentine...
Summary Solifugae are an understudied group of relatively large arachnids with well over 1.000 species distributed on almost all major continents. These highly active predators utilize their chelicerae for feeding, defense, burrowing and mating. We investigated the differences in cheliceral morphology performance two ecologically divergent from North-Africa; cursorial Galeodes sp. Rhagodes melanus. Morphological data show aspect ratio between species. Bite force measurements (n=11) to be a...
Controlled aerial descent has evolved many times independently in vertebrates. Squamates (lizards and snakes) are unusual that respect due to the large number of independent origins evolution this behavior. Although some squamates such as flying geckos genus Ptychozoon dragons Draco show obvious adaptations including skin flaps or enlarged ribs allowing them increase their surface area slow down descent, others appear unspecialized. Yet, specializations can be expected at level sensory...
Measuring biodiversity in the oceans and its modifications with time or during climate change requires accurate description of plankton organisms from viruses to fishes. However, our taxonomic knowledge this 70% Earth is extremely limited. The ultimate way perform large-scale taxonomical analysis achieve full 3D imaging every specimen collected. Novel techniques are undoubtedly at forefront such efforts, will provide an important tool identify, classify generate reference models (or gold...
Acoustic communication is widespread in animals. According to the sensory drive hypothesis [Endler JA (1993) Philos Trans R Soc Lond B Biol Sci 340(1292):215-225], signals and perceptual systems have coevolved. A clear illustration of this evolution tetrapod middle ear, adapted life on land. Here we report discovery a bone conduction-mediated stimulation ear by wave propagation Sechellophryne gardineri, one world's smallest terrestrial tetrapods, which lacks yet produces acoustic signals....
Seahorses and pipehorses both possess a prehensile tail, unique characteristic among teleost fishes, allowing them to grasp hold onto substrates such as sea grasses. Although studies have focused on tail grasping, the pattern of evolutionary transformations that made this possible is poorly understood. Recent phylogenetic show evolved independently in different syngnathid lineages, including seahorses, Haliichthys taeniophorus several types so-called pipehorses. This study explores...
ABSTRACT The Hula Painted Frog ( Latonia nigriventer ) is a rare frog species endemic to the Valley, Israel. sole relict of clade that was widespread mainly in Europe from Oligocene until beginning Pleistocene. osteological characteristics L. are described based on X‐ray microtomography scans extant specimens and Pleistocene bones elucidate evolutionary history Alytidae more specifically . Based description , we now better understand differences, between its sister taxon Discoglossus They...
Being implied in flight, mimetism, communication, and protection, the insect wings were crucial organs for mega diversification of this clade. Despite several attempts, problem wing evolution remains unresolved because basal parts veins essential vein identification are hidden basivenal sclerites. The homologies between characters thus cannot be accurately verified, while they primary importance to solve long-standing problems, such as monophyly Palaeoptera, viz. Odonatoptera,...
Summary The head is a complex integrated system that implicated in many vital functions. As such, its morphology impacted by different and sometimes conflicting demands. Consequently, shape varies greatly depending on the environment dietary ecology of an organism. Moreover, given role territory defence mating lizards, it also subjected to strong sexual selection these animals. We investigated relationships between shape, bite performance diet 14 17 extant Bradypodion species determine...
Trade-offs are thought to be important in constraining evolutionary divergence, as they may limit phenotypic diversification. Limbless animals that burrow head-first have been suggested evolutionarily constrained the development of a large head size and sexual shape dimorphism because potential trade-offs associated with burrowing. Here we use an acontiine skink (Acontias percivali) test for existence between traits burrowing (speed force). As has shown limited lizards, thus suggesting...
Abstract The histological study of vertebrae in extant squamates shows that the internal vertebral structure this group differs from other tetrapods. Squamate are lightly built and basically composed two roughly concentric osseous tubes – one surrounding neural canal constituting peripheral cortex vertebra connected by few thin trabeculae. This structure, which characteristically evokes a tubular bone, results peculiar remodelling process characterised an imbalance between local bone...
Most lizards feed on a variety of food items that may differ dramatically in their physical and behavioral characteristics. Several lizard families are known to upon hard-shelled prey (durophagy). Yet, specializations toward true molluscivory have been documented for only few species. As snails hard brittle items, it has suggested specialized cranial morphology, high bite forces, an adapted feeding strategy important such lizards. Here we compare head skull kinematics snail-crushing teiid...
Atelopus franciscus is a diurnal bufonid frog that lives in South-American tropical rain forests. As many other frogs, males produce calls to defend their territories and attract females. However, this species so-called "earless" lacking an external tympanum thus anatomically deaf. Moreover, A. has no vocal sac sound constraining environment along river banks where it competes with calling frogs. Despite these constraints, male reply acoustically the of conspecifics field. To resolve...
Neotropical harlequin frogs, Atelopus, are a species-rich bufonid group. Atelopus monophyly has been suggested but intergeneric, interspecific and intraspecific relationships poorly understood. One reason is that morphological characters of frogs often difficult to interpret, making species delimitations difficult. Molecular analyses (DNA barcoding, phylogeny) may be helpful sampling hampered as most the more than 100 have undergone severe population declines many possibly extinct. We...
Brain endocasts obtained from computed tomography (CT) are now widely used in the field of comparative neuroanatomy. They provide an overview morphology brain and associated tissues located cranial cavity. Through anatomical comparisons between species, insights on senses, behavior, lifestyle can be gained. Although there many studies dealing with mammal bird endocasts, those performed squamates comparatively rare, thus limiting our understanding their morphological variability...
We describe a new genus and species of hyperoliid tree-frog from the Upper Guinean rain forest, West Africa. Morerella gen. nov. Rödel, Kosuch, Grafe, Boistel & Veith is characterized by slender body large protruding eyes; horizontal oval pupil; small but distinct tympanum; medium sized, medioposterior gular gland, without thin dilatable skin beneath around gland in males; spinosities on back extremities sphenethmoid not visible dorsally; ventroanterior portion unfused; non-imbricate...
In this paper, ultrasound measurements of 1:1 scale three-dimensional (3D) printed trabecular bone phantoms are reported. The micro-structure a horse sample was obtained via synchrotron x-ray microtomography, converted to 3D binary data set, and successfully 3D-printed at 1:1. Ultrasound through-transmission experiments were also performed through highly anisotropic version structure, by elongating the digitized structure prior printing. As in real bone, both fast slow waves observed. This...