A5076462480- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Paleontology and Stratigraphy of Fossils
- Pleistocene-Era Hominins and Archaeology
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Amphibian and Reptile Biology
- Forensic Anthropology and Bioarchaeology Studies
- Marine animal studies overview
- Archaeology and ancient environmental studies
- Fish biology, ecology, and behavior
- Morphological variations and asymmetry
- Geological formations and processes
- Turtle Biology and Conservation
- Advanced Combinatorial Mathematics
- Wildlife Ecology and Conservation
- Geological and Geochemical Analysis
- Fish Ecology and Management Studies
- Primate Behavior and Ecology
- Pacific and Southeast Asian Studies
- Geochemistry and Elemental Analysis
- Cephalopods and Marine Biology
- Bat Biology and Ecology Studies
- Geological and Geophysical Studies
Université Claude Bernard Lyon 1
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Université Jean Monnet
2016-2025
Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement
2016-2025
École Normale Supérieure de Lyon
2016-2025
Université de Lyon
2021-2023
École Normale Supérieure - PSL
2023
Lyon College
2023
Institut des Sciences de l'Evolution de Montpellier
2018-2021
University of Bristol
2012-2018
The Paleocene-Eocene Thermal Maximum (PETM) is correlated with the first occurrences of earliest modern mammals in Northern Hemisphere. latest Paleocene Clarkforkian North American Land Mammal Age, that has yielded rodents and carnivorans, only exception to this rule. However, until now no pre-PETM localities have Europe or Asia. We report equivalent Age deposits basal Sparnacian facies at Rivecourt, north-central part Paris Basin. new terrestrial vertebrate macroflora assemblages are...
Large predators are overabundant in mid-Cretaceous continental dinosaur assemblages of North Africa. Such unbalanced ecosystem structure involves, among predatory dinosaurs, typical abelisaurid or carcharodontosaurid theropods co-occurring with long-snouted spinosaurids debated ecology. Here, we report calcium (Ca) isotope values from tooth enamel (expressed as δ 44/42 Ca) to investigate resource partitioning Niger (Gadoufaoua) and Morocco (Kem Kem Beds). In both assemblages, display a...
Significance The diet of fossil organisms can be inferred through isotopic analysis skeletal tissues, largely assessed using and elemental systems such as carbon isotopes (δ 13 C) strontium/calcium (Sr/Ca) barium/calcium (Ba/Ca) concentration ratios. In the case complex dietary habits omnivory, these must used jointly together with new proxies. Based on expectation that fractionation bio-essential metals occurs during metabolism, we explore variability magnesium 26 Mg) in tooth enamel...
Significance The practice of weaning, the dietary transition from exclusive breastfeeding to nonmilk food, is a key aspect development and evolution hominins, but its study in fossil record hampered by lack unambiguous biomarkers. Ca stable isotope ratios skeletal remains are expected bear information about milk consumption. Here we demonstrate that modern human tooth enamel records temporal variation compositions, which related duration. isotopes could be used as biomarker for...
Two specimens originally referred by Louis Dollo to Goniopholis simus from the Lower Cretaceous of Bernissart, Belgium, are described. They consist fully articulated skeletons, one missing skull and mandible. Comparison these with recently revised Wealden England allows confirmation that Belgian referable goniopholidid Anteophthalmosuchus hooleyi. The most completely known representatives not only this species but also any Goniopholididae. Study postcranial skeletons Bernissart reveals...
Abstract Diet is a major driver of hominin evolution, but most the geochemical evidence relies on carbon isotopes (δ 13 C). Here, we report enamel stable calcium isotope 44/42 Ca) values against δ C for several hominins and co-existing primates in Turkana Basin area, circa 4 to 2 Ma. Australopithecus anamensis clusters with mammal browsers, Kenyanthropus platyops distinct from A . foraging into more open environments coexisting Theropithecus brumpti encompasses both grazer omnivore/carnivore...
Teleosauridae and Metriorhynchidae were thalattosuchian crocodylomorph clades that secondarily adapted to marine life coexisted during the Middle Late Jurassic. While teleosaurid diversity collapsed at end of Jurassic, most likely as a result global cooling oceans associated regressions, metriorhynchid was largely unaffected, although fossil record Thalattosuchia is poor in Cretaceous. In order investigate possible differences thermophysiologies between these two lineages, we analysed stable...
Abstract The origin of modern crocodylians is rooted in the Cretaceous, but their evolutionary history obscure because relationships outgroups and transitional forms are poorly resolved. Here, we describe a new form, Varanosuchus sakonnakhonensis gen. nov., sp. from Early Cretaceous Thailand that fills an gap between Paralligatoridae Atoposauridae, two derived neosuchian lineages with previously unsettled phylogenetic relationships. Three individuals, including complete skull associated...
Abstract Eosuchus lerichei is a gavialoid crocodylian from late Paleocene marine deposits of northwestern Europe, known skull and lower jaws, as well postcrania. Its sister taxon relationship with the approximately contemporaneous species minor east coast USA has been explained through transoceanic dispersal, indicating capability for salt excretion that absent in extant gavialoids. However, there currently no anatomical evidence to support adaptation extinct Furthermore, placement within...
<strong class="journal-contentHeaderColor">Abstract.</strong> The fourth complete skull of the marine crocodilian <i>Machimosaurus</i> von Meyer, 1837 is hereby described together with an associated mandible and disarticulated postcranial elements from Kimmeridgian Neuffen, Germany. Although genus has been fairly recently on basis two nearly skulls, their state preservation did not allow a thorough examination entire anatomy. Here, we add new information description nicely preserved cranial...
Crocodilian remains from the late Palaeocene continental locality of Mont de Berru (Marne, France) offer opportunity to reassess taxonomic identity oldest diplocynodontid Europe. Owing significant morphological differences previously described species Diplocynodon, which include presence a splenial symphysis, new species, Diplocynodon remensis sp. nov., is erected here. Its inclusion in phylogenetic framework for Eusuchia leads its positioning as derived member diplocynodontids....
Abstract The recent development of multi‐collector inductively coupled plasma mass spectrometry ( MC ‐ ICP‐MS ) notably in the disciplines earth sciences, now allows precise measurement isotope ratios, even at low concentration. Non‐traditional systems, such as alkaline (Ca, Mg) and transition (Cu, Fe, Zn) metals are being measured a variety biological tissues, including bone teeth. Although our understanding environmental mechanisms behind fractionation elements is still its infancy, some...
The core of the fossil record Teleosauridae, a family thalattosuchian crocodylomorphs, is well known from western Tethyan marine deposits Jurassic. Outside this province, their patchy and in need revision, with specimens Russia, Madagascar, Asia. Peipehsuchus teleorhinus Early or Middle Jurassic China teleosaurid have been mentioned preliminarily described two localities Thailand, yet they were not assigned to given taxon. Thanks recent field work, at least 10 individuals represented by...
Calcium isotopic ratios in dental enamel of South African hominins reveal taxon-dependent nursing behaviors.
Abstract Osteoderms of eight extant and extinct species crocodylomorphs are studied histologically morphologically. Most osteoderms display the typical “crocodilian” structure with a woven‐fibered matrix surrounded by an upper lower parallel fibered matrix. The dorsal ornamentation those specimens consists pit‐and‐ridge structure, corresponding remodeling mechanisms. However, osteoderm Iberosuchus , here for first time, differs in being nearly devoid ornamentation; moreover, it shows strong...
ABSTRACT Two exquisitely preserved specimens from the Late Cretaceous of southeastern France, together with less complete material southwestern allow most description cranial morphology Acynodon iberoccitanus. The extremely brevirostrine condition associated a unique dentition might indicate derived dietary behavior for Acynodon. New characters were coded in previously published matrix. In this context, is placed polytomy at base Globidonta. As an early European form, position implies that...
Abstract In the early 1980s, remains of a large crocodilian, consisting nearly complete lower jaw, were referred to distinct species S unosuchus , . thailandicus The specimen was recovered from road‐cut near N ong B ua L amphu, north‐eastern T hailand, in upper part continental P hu K radung F ormation, and then considered E arly M iddle J urassic age. Since then, this age has been revised most formation is now C retaceous, although ate possible for its lowermost part. Here, we report first...