A5007267662- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Paleontology and Stratigraphy of Fossils
- Fish biology, ecology, and behavior
- Amphibian and Reptile Biology
- Fossil Insects in Amber
- Fish Biology and Ecology Studies
- Geological formations and processes
- Pleistocene-Era Hominins and Archaeology
- Geology and Paleoclimatology Research
- Turtle Biology and Conservation
- Plant Diversity and Evolution
- Bat Biology and Ecology Studies
- Archaeological and Geological Studies
- Insect and Arachnid Ecology and Behavior
- Coleoptera Taxonomy and Distribution
- Fish Ecology and Management Studies
- Marine animal studies overview
- Marine and fisheries research
- Environmental and Biological Research in Conflict Zones
- Geotourism and Geoheritage Conservation
- Scarabaeidae Beetle Taxonomy and Biogeography
- Physiological and biochemical adaptations
- Marine and environmental studies
Université de Rennes
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Géosciences Rennes
2016-2025
École Européenne Supérieure de l'Image
2024
Sorbonne Université
2016
Collège Lionel Groulx
2016
Natural History Museum of Geneva
2016
Universidad Autónoma de Madrid
2008-2012
La Rochelle Université
2012
The fossil fish Ptychodus Agassiz, 1834, characterized by a highly distinctive grinding dentition and an estimated gigantic body size (up to around 10 m), has remained one of the most enigmatic extinct elasmobranchs (i.e. sharks, skates rays) for nearly two centuries. This widespread Cretaceous taxon is common in Albian Campanian deposits from almost all continents. However, specimens mostly consist isolated teeth or more less complete dentitions, whereas cranial post-cranial skeletal...
Background The Tapejaridae is a group of unusual toothless pterosaurs characterized by bizarre cranial crests. From paleoecological point view, frugivorous feeding habits have often been suggested for one its included clades, the Tapejarinae. So far, presence these intriguing flying reptiles has unambiguously documented from Early Cretaceous sites in China and Brazil, where pterosaur fossils are less rare fragmentary than similarly-aged European strata. Methodology/Principal Findings...
We report the discovery of mammalian tribosphenic teeth from basal Cenomanian southwestern France that we refer to a new primitive marsupial-like form identified as taxon Marsupialiformes, clade recognized here include crown group Marsupialia and stem lineages more closely related than Deltatheroida. Arcantiodelphys marchandi gen et sp nov. shares several significant features (s.l.) with marsupialiform taxa known North American Mid-Cretaceous. Among marsupialiforms, it shows closer...
The locality of Pietraroia (Lower Albian, southern Apennines, Italy) has provided two fully articulated crocodylomorphs, exposed in ventral and dorsal aspect, which are described here as representing a new species genus, Pietraroiasuchus ormezzanoi gen. nov, sp. nov. taxon is found to be the sister Pachycheilosuchus trinquei from Albian Glen Rose Formation, Texas. resolves phylogenetic position controversial P. trinquei, crucial enabling an extensive understanding family Hylaeochampsidae....
Spinosaurs represent a group of peculiar theropod dinosaurs that have often been described as "crocodile-mimic", predominantly fish-eating predators, and recently claimed to semi-aquatic animals.Here we report suite craniodental characters unexpectedly shared by spinosaurs pike conger eels.Pike eels are predatory, mainly piscivorous bottom-dwelling anguilliform fishes inhabit marine brackish environments.These two groups show mediolaterally compressed, elongated rostrum, terminal "rosette"...
The ecomorphological diversity of extinct elasmobranchs is incompletely known. Here, we describe Aquilolamna milarcae, a bizarre probable planktivorous shark from early Late Cretaceous open marine deposits in Mexico. Aquilolamna, tentatively assigned to Lamniformes, characterized by hypertrophied, slender pectoral fins. This previously unknown body plan represents an unexpected evolutionary experimentation with underwater flight among sharks, more than 30 million years before the rise manta...
Otodus megalodon (Lamniformes: Otodontidae) is an iconic Neogene shark, but the lack of well-preserved skeletons has hampered our understanding various aspects its biology. Here, we reassess some biological properties using a new approach, based on known vertebral specimens O. and 165 species extinct extant neoselachian sharks across ten orders. Using median neurocranial caudal fin proportions relative to trunk proportion among non-mitsukurinid/non-alopiid lamniforms, show that could have...
The developmental stages of feathers are major importance in the evolution body covering and origin avian flight. Until now, there were significant gaps knowledge early morphologies theoretical as well palaeontological material. Here we report fossil evidence an intermediate critical stage incremental which has been predicted by theories but hitherto undocumented from both recent records. Seven have found Early Cretaceous (Late Albian, ca 100 Myr) amber western France, display a flattened...
The mid-Cretaceous vertebrate assemblage from south-eastern Morocco is one of the most diversified continental assemblages this time worldwide. bony fish component (coelacanths, lungfishes and ray-finned fishes) represented by relatively complete specimens and, mostly, fragmentary elements scattered along 250 kilometres outcrops. Here we revisit studying both isolated remains collected during several fieldtrips more material kept in public collections. comprises lungfish taxa, with first...
ABSTRACT The teeth of six dinosaur taxa (Carcharodontosauridae indet., Dromaeosauridae Troodontidae Brachiosauridae Iguanodontoidea and Nodosauridae indet.) are identified described from the early Cenomanian Charentes region, western France. composition paleoecology this coastal, insular fauna is discussed. assemblage shares affinities with Asiamerican Gondwanan faunas. This clarifies highlights role European islands in paleobiogeography Cretaceous dinosaurs.
Early Cretaceous ornithomimosaurian theropod dinosaurs have been reported from various localities in Asia, whereas they remain poorly represented and extremely rare North America, Africa Europe.So far, the only known European ornithomimosaur is Pelecanimimus Barremian of Spain.The recent discovery southwestern France a lignitic bone bed Angeac, which has yielded several hundred bones, sheds new light on fossil record.Based this material, we re-evaluate here systematic position isolated bones...
Paléobiodiversité des vertébrés du Lagerstätte Crétacé inférieur (Berriasien) d'Angeac-Charente (sud-ouest de la France), implications pour le renouvellement faunique continental à limite J/K. La faune continentaux, représentée fois par macro- et microrestes, Berriasien est décrite ici. Cette riche diversifiée comprend au moins 38 taxons différents provenant tous les grands clades constituée plus 50 000 spécimens. Le gisement diversifié bonebeds mixtes seul connu ce jour dans monde. Il donne...