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Dizoniopsis coppolae (Aradas, 1870) (Gastropoda: Cerithiopsidae) in the Bay of Biscay
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RBINS Staff Publications 2021
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Ath "Les Haleurs", deux occupations Rubané et Blicquy/Villeneuve-Saint-Germain (Néolithique ancien). Mécanismes de transition culturelle par l'étude intégrée des productions.
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RBINS Staff Publications 2024
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Review of the historical collection of Charipinae (Hymenoptera: Figitidae) preserved in the RBINS
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Specimens from the subfamily Charipinae (Figitidae) deposited in the Royal Belgian Institute of Natural Sciences (RBINS) were examined, in total 44 individuals were identified, belonging to eleven species. Five species are reported for the first time in Belgium: Alloxysta citripes (Thomson, 1862), A. fuscipes (Thomson, 1862), A. halterata (Thomson, 1862), A. ramulifera (Thomson, 1862) and Phaenoglyphis fuscicornis (Thomson, 1877); making 14 known species of Charipinae in Belgium. Additionally, for the first time, host information is reported for P. fuscicornis and A. consobrina (Zetterstedt, 1838).
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RBINS Staff Publications 2024
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Overview of myrmecological studies and a checklist of the ants (Hymenoptera, Formicidae) of the Democratic Republic of Congo
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The production of species checklists is fundamental to setting baseline knowledge of biodiversity across the world and they are invaluable for global conservation efforts. The main objective of this study is to provide an up-to-date extensive checklist of the ants of the Democratic Republic of Congo (DRC), the largest country in sub-Saharan Africa, based on available literature to serve as a foundation for future research and ant faunistic developments. We gathered the literature available to us, most of it compiled from the Global Ant Biodiversity Informatics (GABI) Project and treated the data to province level when possible. We also offer insight into who, when and where contributions have emerged to the current knowledge of the ants of the DRC and each of its 26 provinces. The current list is restricted to valid species and subspecies, discarding morphospecies and some misidentified taxa. The list comprises eight subfamilies, 64 genera and 736 species, the highest species diversity for a country located within the Afrotropical realm.
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RBINS Staff Publications 2024
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First record of three alien termite species in Belgium
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Subterranean termites (Family Rhinotermitidae) and drywood termites (Family Kalotermitidae) can be pest species as they have the potential to inflict damage to wooden constructions and can therefore cause a significant economic impact. Some species of these families are highly destructive and are invasive in many parts of the world. New introductions and/or the spread of termites are often caused by import of infested wood, plants or soils. The present study reports the first records of three exotic termite species in Belgium, viz. Cryptotermes brevis and Reticulitermes banyulensis in Brussels (Brussels Capital Region), and Reticulitermes flavipes in Brugelette (Hainaut province; Walloon region). The morphological identification of the specimens (N = 8) was validated by DNA-barcoding. Cryptotermes brevis and Reticulitermes banyulensis infestations are probably of little concern as local climatological conditions make it unlikely for either species to survive in the temperate climate in Belgium. In contrast, it is likely that Reticulitermes flavipes may become established and will spread to other sites in Belgium.
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RBINS Staff Publications 2024
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The origins and spread of domestic horses from the Western Eurasian steppes
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RBINS Staff Publications 2022
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Un crâne de crocodilien du Paléocène inférieur de Chine recule l'apparition des crocodyloïdes en Asie
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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.
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RBINS Staff Publications 2022 OA
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Vestibular sensitivity and locomotor behavior in early paleocene mammals
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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.
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RBINS Staff Publications 2022 OA
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Un crâne de crocodilien du Paléocène inférieur de Chine recule l'apparition des crocodyloïdes en Asie
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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.
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RBINS Staff Publications 2022 OA
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Evolution of European carnivorous mammal assemblages through the Palaeogene
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The rise of Carnivora (Mammalia: Laurasiatheria) is an important evolutionary event that changed the structure of terrestrial ecosystems, starting at the dawn of the Eocene, 56 Mya. This radiation has been mainly analysed in North America, leaving the evolution of carnivoran diversity in other regions of the globe poorly known. To tackle this issue, we review the evolution of terrestrial carnivorous mammal diversity (Mesonychidae, Oxyaenidae, Hyaenodonta and Carnivoramorpha) in Europe. We reveal four episodes of intense faunal turnovers that helped establish the dominance of carnivoramorphans over their main competitors. We also identify two periods of general endemism. The remaining time intervals are characterized by dispersals of new taxa from North America, Asia and Africa. The European Palaeogene carnivorous mammal fauna appears to have been almost constantly in a transient state, strongly influenced by dispersals. Many of the bioevents we highlight for European carnivorous mammals are probably best seen as ecosystem-wide responses to environmental changes. In contrast to the North American record, European hyaenodonts remain more diverse than the carnivoramorphans for the entire Eocene. The replacement of hyaenodonts by carnivoramorphans as the most diverse and dominant predators only occurred after the ‘Grande Coupure’ at 33 Mya, about 16 Myr later than in North America.
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RBINS Staff Publications 2022 OA