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Techreport Reference Natuursteen in de depositie van ballaststeen en hergebruikte bouwmaterialen van de Burcht. Scheldekaaien/Noorderterras.
Located in Library / RBINS Staff Publications 2023
Inproceedings Reference Les lézard Iguania (Pleurodonta et Acrodonta) de l’Eocène inférieur (MP7) de Dormaal, Belgique
Depuis quelques années, les lézards de l’Eocène basal de Dormaal (niveau-repère MP7), Belgique sont en cours de révision. Après le varanidé Saniwa orsmaelensis et les geckos, ce sont les lézards Iguania qui viennent de faire l’objet d’une étude approfondie. Ce groupe est représenté d’une part par les Acrodonta (incluant les agames et les caméléons), actuellement plutôt distribués dans l’Ancien Monde, et d’autre part par les Pleurodonta (les iguanes), principalement distribués dans le Nouveau Monde. Mais dans nos régions, ces deux groupes de lézards cohabitaient de l’Eocène basal, durant le Maximum Thermique Paléocène-Eocène (PETM), climat le plus chaud des 66 derniers millions d’années, jusqu’à la fin de l’Eocène inférieur (MP10, Prémontré, France). Aujourd’hui cette co-occurrence ne se retrouve plus qu’à Madagascar. Un maxillaire complet de l’agame Tinosaurus europeocaenus, le plus vieil agame européen, donne de nombreux caractères diagnostiques de cette espèce et permet de le rapprocher du genre actuel Leiolepis. Les différences avec Tinosaurus indicus de l’Inde, T. doumuensis de Chine et Tinosaurus sp. d’Amérique du Nord sont aussi discutées. Pour les pleurodontes, à côté du lézard bien connu Geiseltaliellus, un nouveau genre, Bifurcodentodon, a pu être identifié sur base d’un maxillaire présentant une morphologie dentaire toute particulière. En effet, la traditionnelle cuspide centrale des dents est dédoublée indiquant probablement un régime alimentaire spécialisé. Cette spécialisation pourrait avoir causé la perte de ce taxon en raison de la compétition avec les espèces plus généralistes et plus adaptatives faces au changement climatique du Paléogène. Financements Ce travail fut possible grâce au financement SYNTHESYS BE-TAF-8234 de la Commission Européenne (A. Č .), à la bourse 1/0191/21 de l’Agence des Bourses Scientifiques du Ministère de l’Education de Slovaquie et de l’Académie des Sciences de Slovaquie (A. Č .) et au projet Belspo BRAIN BR/121/A3/PALEURAFRICA (T. S.) du Ministère de la Politique Scientifique Belge.
Located in Library / RBINS Staff Publications 2023
Inproceedings Reference Dormaal lizards in Belgium – a rare window into the earliest Eocene ‘greenhouse world’
During the Eocene, world climate experienced rapid and intense global warming, reaching a peak during the Palaeocene–Eocene Thermal Maximum (PETM), 56 my ago. The warmest global climate of the past 66 my occurred during the early Eocene epoch (about 56 to 48 mya) when megathermal floral elements, including palms, reached Antarctica. The increase in temperatures led to a rise in sea level, turning Europe into an archipelago. Data regarding the early Eocene herpetofaunas are scant, but the locality of Dormaal in Belgium represents one of the rare exceptions. The lizards consist of gekkotans, acrodontan and pleurodontan iguanians, anguimorphs such as glyptosaurines and the varanid Saniwa. These groups are believed to be thermophilic, and their appearance in this high latitude locality indicates that the tropics were expanded during this time. Some of these records also represent first appearances of these clades in Europe. Among them, a new iguanian taxon is represented by a unique tooth morphology – the teeth are bifurcated – indicating a specialization on trophic resources. However, because terrestrial ecosystems changed substantially during the Palaeogene, this might have caused higher extinction risk relative to generalists (e.g., the iguanian Geiseltaliellus). Understanding this geological epoch is relevant for present global climate change, including sea level rise, as well as the expansion of distribution of thermophilic taxa, including parasites that cause serious infectious diseases such as malaria.
Located in Library / RBINS Staff Publications 2023
Article Reference Mise au jour d’une nouvelle partie de la collection de François Beaufays (dit « l’Horloger ») contenant des vestiges humains de Spy (Prov. de Namur, BE)
Located in Library / RBINS Staff Publications 2023 OA
Article Reference The tympanoperiotic complex of the blue whale, Balaenoptera musculus
Located in Library / RBINS Staff Publications 2023
Article Reference DNA taxonomy reveals high species diversity among the stygobiont genus Metastenasellus (Crustacea, Isopoda) in African groundwater
Located in Library / RBINS Staff Publications 2023
Article Reference Review of the lanternfly genus Pyrops of Thailand (Hemiptera: Fulgoridae) with notes and keys to species
Located in Library / RBINS Staff Publications 2023
Article Reference Sixteen issid planthopper species in one day in Dong Son-Ky Thuong Nature Reserve in North Vietnam: Eight new species, one new genus and additional new records (Hemiptera: Fulgoromorpha: Issidae)
Located in Library / RBINS Staff Publications 2023
Article Reference Limits of calcium isotopes diagenesis in fossil bone and enamel
Diagenesis has been recognized for decades to significantly alter the trace elements biogenic signatures in fossil tooth enamel and bone that are routinely used for paleobiological and paleoenvironmental reconstructions. This signature is modified during diagenesis according to a complex continuum between two main processes, addition and substitution. For an additive-like, or early diagenesis, the trace elements biogenic profiles can be restored by leaching secondary minerals, but this technique is inefficient for a substitutive-like, or extensive diagenesis for which secondary trace elements are incorporated into the biogenic mineral. This scheme is however unclear for Ca, the major cation in tooth enamel and bone hydroxylapatite, whose stable isotope composition (δ44/42Ca) also conveys biological and environmental information. We present a suite of leaching experiments for monitoring δ44/42Ca values in artificial and natural fossil enamel and bone from different settings. The results show that enamel δ44/42Ca values are insensitive to an additive-like diagenesis that involves the formation of secondary Ca- carbonate mineral phases, while bone shows a consistent offset toward 44Ca-enriched values, that can be restored to the biogenic baseline by a leaching procedure. In the context of a substitutive-like diagenesis, bone exhibits constant δ44/42Ca values, insensitive to leaching, and shows a REE pattern symptomatic of extensive diagenesis. Such a REE pattern can be observed in fossil enamel for which δ44/42Ca values are still fluctuating and follow a trophic pattern. We conclude that Ca isotopes in fossil enamel are probably not prone to extensive diagenesis and argue that this immunity is due to the very low porosity of enamel that cannot accommodate enough secondary minerals to significantly modify the isotopic composition of the enamel Ca pool.
Located in Library / RBINS Staff Publications 2023
Article Reference Partial revision of the genus Dorysthenes (subgenus Paraphrus ) Thomson, 1861 with overall review of the species planicollis (Bates, (Coleoptera, Cerambycidae, Prioninae, Prionini )
Located in Library / RBINS Staff Publications 2023 OA