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Article Reference Application du logiciel de modélisation musculosquelettique lhpFusionBox à une problématique paléoanthropologique. Spyrou le Néandertalien marche !
Résumé LhpFusionBox est un logiciel développé pour des études biomécaniques et cliniques relatives au système musculosquelettique des hommes anatomiquement modernes (HAM). Il a été récemment adapté aux problématiques paléoanthropologiques et utilisé pour l’étude biomécanique de la locomotion des hominidés fossiles. Il n’existe aucun squelette de Néandertalien complet. Le but de notre étude a consisté à réaliser un modèle virtuel en trois dimensions (3D) du squelette relativement complet du Néandertalien Spy II et à tester la faisabilité d’une analyse biomécanique de la locomotion du genou et des bras de levier des muscles ischio-jambiers. Des ossements appartenant à d’autres individus néandertaliens ont été mis à l’échelle de ceux de Spy II afin de remplacer les ossements incomplets ou manquants. Ces études biomécaniques préliminaires semblent montrer que les Néandertaliens et les HAM ont une locomotion comparable. Les Néandertaliens semblent avoir des bras de levier plus grands au niveau des muscles de la cuisse, ce qui pourrait leur procurer un avantage biomécanique. Le squelette obtenu a été imprimé en 3D et a servi de base à la reconstruction artistique de Spyrou qui est hébergée en l’espace de l’homme de Spy (EHoS). [Application of the musculo-skeletal modelling software lhpFusionBox to a paleoanthropological problem: the Spyrou Neandertal moves!] Abstract LhpFusionBox is a program originally designed for biomechanical and clinical studies relating to the musculoskeletal system of anatomically modern humans (AMH). The program has recently been adapted for paleontological purposes and used to reconstruct and biomechanically analyse a fossil hominid. There is no complete Neandertal skeleton in the fossil record. The aim of the study was to reconstruct a complete three-dimensional (3D) model of a Neandertal using the relatively complete Spy II Neandertal and to conduct biomechanical feasibility studies on the knee and hamstring moment arms of the skeleton. Different Neandertal specimens were scaled to the size of Spy II to replace incomplete or missing bones. Biomechanical feasibility studies performed on the knee seem to show that Neandertal and AMHh gait is similar and Neandertals were shown to have larger moment arms in the hamstring muscles, which would have given them a mechanical advantage. The complete Neandertal was printed in 3D and used as the base to create the artistic model of “Spyrou” housed at l’Espace de l’Homme de Spy (EHoS) museum.
Located in Library / RBINS Staff Publications
Article Reference Applications of imaging methodologies to paleoanthropology: beneficial results relating to the preservation, management and development of collections
The limited number of unearthed fossils and their accessibility are factors that hinder paleoanthropological studies. Original remains, but also osteological collections of extant specimens, have to be curated in optimal and adapted environments, and direct manipulation needs to be limited in order to preserve this irreplaceable patrimony. Imaging methodologies have recently provided ways for innovative advances in the preservation of these collections, as well as offering new perspectives to museographic displays and original scientific studies. Here, we describe recent examples of developments obtained from imaging methodologies and discuss methodological and ethical implications of these new “virtual” collections. Undeniably, “virtual anthropology” is an additional tool in our large set of analytical possibilities and for curators, with its specific constraints related to the particular nature of the analysed material. Finally, we suggest some possible guidelines for the optimisation of the preservation, management and development of collections while preserving their scientific exploitation.
Located in Library / RBINS Staff Publications
Article Reference Applying micro-CT imaging in the study of historically and newly collected specimens of Belosaepia (Sepiida, Coleoidea, Cephalopoda) from the Early Eocene (Ypresian) of Belgium
Located in Library / RBINS Staff Publications 2022
Inproceedings Reference Applying micro-CT imaging in the study of fossil sepiids and nautilids (Cephalopoda): examples from the Eocene of Belgium
Located in Library / RBINS Staff Publications 2020
Article Reference Apport à la connaissance des heligmonevra de l'Afrique Occidentale et description d'une nouvelle espèce (Diptera, Asilidae)
Located in Library / RBINS Staff Publications
Article Reference Apport de la micro-tomodensitométrie et de l’imagerie 3D à l’étude des trépanations néolithiques et médiévales en Belgique
Located in Library / RBINS Staff Publications 2019
Article Reference Archaeoziphius microglenoideus, a new primitive beaked whale (Mammalia, Cetacea, Odontoceti) from the Middle Miocene of Belgium
Located in Library / RBINS Staff Publications
Techreport Reference Archeologische opgraving Noorderterras. Natuursteen in de depositie van ballaststeen en hergebruikte bouwmaterialen van de Burcht, Scheldekaaien – Noorderterras (Antwerpen): aanvullend onderzoek van gesteenten opgeslagen in het Felixarchief.
Located in Library / RBINS Staff Publications 2024
Article Reference Are less detrimental parasites better integrated in an inquiline community? A test using red wood ant myrmecophiles
Background: A host infected with multiple parasitic species provides a unique system to test evolutionary and ecological hypotheses. Different parasitic species associated with a single host are expected to occupy different niches. This niche specialization can evolve from intraguild competition among parasites. However, niche specialization can also be structured directly by the host when its defence strategy depends on the parasite’s potential impact. Then it can be expected that species with low or no tendency to prey on host brood will elicit less aggression than severe brood parasitic species and will be able to integrate better in the host system. We examined this hypothesis in a large community of symbionts associated with European red wood ants (Formica rufa group) by testing the association between 1) level of symbiont integration (i.e. presence in dense brood chambers vs. less populated chambers without brood) 2) level of ant aggression towards the symbiont 3) brood predation tendency of the symbiont. Results: Symbionts differed vastly in integration level and we demonstrated for the first time that relatively unspecialized ant symbionts or myrmecophiles occur preferentially in brood chambers. Based on their integration level, we categorize the tested myrmecophiles into three categories: 1) species attracted to the dense brood chambers 2) species rarely or never present in the brood chambers 3) species randomly distributed throughout the nest. The associates varied greatly in brood predation tendency and in aggression elicited. However, we did not find a correlation for the whole myrmecophile community between a) brood predation tendency and host’s aggression b) integration level and host’s aggression c) integration level and brood predation tendency. Conclusions: Our results indicate that red wood ants did not act more hostile towards species that have a high tendency to prey on brood compared to species that are less likely or do not prey on brood. We show that potentially harmful parasites can penetrate into the deepest parts of a social insect fortress. We discuss these seemingly paradoxical findings in relation to models on coevolution and evolutionary arms races and list factors which can make the presence of potentially harmful parasites within the brood chambers evolutionary stable.
Located in Library / RBINS Staff Publications 2016
Article Reference Assessing paleotemperature and seasonality during the early Eocene climatic optimum (EECO) in the Belgian Basin by means of fish otolith stable O and C isotopes.
Located in Library / RBINS Staff Publications