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Inproceedings Reference Vestibular sensitivity and locomotor behavior in early paleocene mammals
The end-Cretaceous extinction triggered the collapse of ecosystems and a drastic turnover of mammalian communities. During the Mesozoic, mammals were ecologically diverse, but less than extant species. Modern ecological richness was established by the Eocene, but questions remain about the ecology of the first wave of mammals radiating after the extinction. Postcranial fossils are often used to determine locomotor behavior; however, the semicircular canals of the inner ear also represent a reliable proxy. These canals detect the angular acceleration of the head during locomotion and transmit neuronal signals to the brain to allow stabilization of the eyes and head. Accordingly, vestibular sensitivity to rapid rotational head movements is higher in species with a larger canal radius of curvature and more orthogonal canals. We used high-resolution computed tomography scanning to obtain inner ear virtual endocasts for 30 specimens. We supplemented these with data from the literature to construct a database of 79 fossils from the Jurassic to the Eocene and 262 extant mammals. We compared data on canal morphology and another lifestyle proxy, the size of the petrosal lobules, which have a role in maintaining eyes’ movements and position. We find that Paleocene mammals exhibited a lower average and more constricted range of Agility Indices (AI), a new measure of canal radius size relative to body size, compared to Mesozoic, Eocene and extant taxa. In the early Paleocene, body mass and canal radius increased, but the former outpaced the latter leading to an AI decline. Similarly, their petrosal lobules were relatively smaller on average compared to other temporal groups, which suggests less ability for fast movements. Additionally, Paleocene mammals had similar AIs to extant scansorial and terrestrial quadrupeds. In contrast, the lack of canal orthogonality change from the Mesozoic to the Paleocene indicates no trend toward lower vestibular sensitivity regardless of changes in body size. This result may reflect functional differences between canal orthogonality and radius size. Our results support previous work on tarsal morphology and locomotor behavior ancestral state reconstruction suggesting that ground dwelling mammals were more common than arboreal taxa during the Paleocene. Ultimately, this pattern may indicate that the collapse of forested environments immediately after extinction led to the preferential survivorship of more terrestrially adapted mammals. Funding Sources Marie Sklodowska-Curie Actions: IF, European Research Council StG, National Science Foundation, Belgian Science Policy Office, DMNS No Walls Community Initiative.
Located in Library / RBINS Staff Publications 2022 OA
Inproceedings Reference Un crâne de crocodilien du Paléocène inférieur de Chine recule l'apparition des crocodyloïdes en Asie
Les plus anciens crocodiliens (Crocodylia) d’Asie ne sont représentés jusqu’à présent que par des alligatoroïdes et des planocraniidés. Bien que les crocodyloïdes ne soient pas connus avec certitude avant l’Éocène supérieur, l’hypothèse a été émise que des crocodyloïdes basaux de type Asiatosuchus étaient originaires d’Asie avant la fin du Paléocène. Nous décrivons ici un nouveau crocodyloïde fossile provenant du Paléocène inférieur du Bassin de Qianshan, province d’Anhui, Chine. Le crâne et le fragment de mâchoire inférieure associé présentent plusieurs caractéristiques typiques de crocodiliens juvéniles. Ils présentent également une combinaison de caractères non observés dans aucun autre taxon, ce qui justifie l’érection d’une nouvelle espèce et d’un nouveau genre. Les affinités phylogénétiques sont testées dans des analyses basées sur deux matrices de caractères récentes d’Eusuchia. Pour évaluer l’effet des caractéristiques juvéniles sur le résultat des analyses phylogénétiques, des spécimens juvéniles des crocodiliens actuels Alligator mississippiensis et Crocodylus niloticus ont été analysés de la même manière, montrant que l’effet de leur stade ontogénétique sur leur position dans l’arbre est minime. Nos analyses indiquent que le nouveau taxon de Qianshan occupe une position basale au sein des Crocodyloidea. La présence de ces derniers en Asie est donc reculée au Paléocène inférieur, soit 15 à 20 millions d’années plus tôt que ce que l’on pensait auparavant. De plus, nos résultats corroborent les hypothèses précédentes d’une route de dispersion paléocène des crocodyloïdes de type Asiatosuchus de l’Asie vers l’Europe.
Located in Library / RBINS Staff Publications 2022 OA
Inbook Reference System-to-system Interface Between the EMSA CleanSeaNet Service and OSERIT
The European Maritime Safety Agency (EMSA) and the Royal Belgian Institute of Natural Sciences (RBINS) develop and operate together a system-to-system interface between the EMSA’s CleanSeaNet service and OSERIT, the Belgian Oil Spill Evaluation and Response Integrated Tool. This interface is meant to provide CleanSeaNet users with a support tool for early and automatic oil drift and fate simulation results of any satellite-detected oil spills reported by the CleanSeaNet service in the North Sea and the English Channel. In view of the automatic forecast and backtrack simulations results, CleanSeaNet users have the possibility to further refine this early risk assessment either by activating their own national decision support system or by requesting new, advanced simulations through the CleanSeaNet GIS viewer. This interface is currently passing the final acceptance tests. However, the system has already been used by RBINS for the oil pollution event subsequent to the Flinterstar sinking at 8km off the port of Zeebruges on the 6 th of October 2015. This event perfectly illustrates the potential synergies of remote sensing and modelling in case of marine pollution and their integration in risk assessments that must be performed for any significant pollution of the marine system.
Located in Library / RBINS Staff Publications 2020
Article Reference Archeozoölogisch onderzoek over de transitie Romeinse-vroegmiddeleeuwse periode in België
Located in Library / No RBINS Staff publications
Inbook Reference La faune du site de l'Hospice Saint-Gilles à Namur: résultats préliminaires. In: Corbiau, M.H. & Plumier, J. (eds.)
Located in Library / No RBINS Staff publications
Inbook Reference Consumption refuse from the Byzantine castle at Pessinus, Central-Anatolia, Turkey
Located in Library / No RBINS Staff publications
Inbook Reference Possibilities of archaezoological analysis from the antique site of Sagalassos (Burdur Province, Turkey)
Located in Library / No RBINS Staff publications
Article Reference Domestication of the cat and reflections on the scarcity of finds in archaeological contexts
Located in Library / No RBINS Staff publications
Inbook Reference Faunal remains at Sagalassos: Preliminary results of the archaeozoological analysis
Located in Library / No RBINS Staff publications
Inbook Reference The antique site of Sagalassos (Burdur Province, Turkey): results from the 1990-1994 excavation campaigns
Located in Library / No RBINS Staff publications