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Article Reference Seasonal modifications and morphogenesis of the hypercalcified sponge Petrobiona massiliana (Calcarea, Calcaronea)
The periodicity of sexual elements and soft tissue modifications during the life cycle of the hypercalcified sponge Petrobiona massiliana was investigated monthly from June 2006 to November 2007. Sexual reproduction, likely regulated by seawater temperatures, occurred during more than half of the year (from early April to late October); 70% of the samples appeared reproductively active. Specimens of P. massiliana displayed a high plasticity of tissue organization, allowing modulation and rearrangement of their aquiferous systems in response to life cycle phases and environmental changes. Permanent changes were observed in the basal region of the choanosome in non-reproductive specimens, such as disorganization/ restructuring events leading to remodeling of the aquiferous system. Periodic modifications occurring during sexual reproduction included the transformation of choanocytes from a typical form to hourglass and vespiform shapes, and more global disorganization of the basal region of the choanosome during provisioning of oocytes and embryos, followed by restructuring after release of the larvae. Finally, episodic disorganization/reorganization phenomena occurred in a few specimens after unfavorable environmental conditions (e.g., decreasing seawater temperatures). Histological and ultrastructural observations of storage cells, located in peculiar trabecular tracts, suggest a transdifferentiation capacity that allows such soft tissue dynamics.
Located in Library / RBINS Staff Publications
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 Agora 3D: evaluating 3D imaging technology for the research, conservation and display of museum collections
Located in Library / RBINS Staff Publications
Article Reference Strategy for ranking potential CO2 storage reservoirs: A case study for Belgium
CO2 capture and storage (CCS) is likely to become a necessary option in mitigating global climate change. However, lack of detailed knowledge on potential deep geological reservoirs can hamper the development of CCS. In this paper a new methodology is presented to assess and create exploration priority lists for poorly known reservoirs. Geological expert judgements are used as a basis in a two-stage geotechno-economic approach, where first an estimate of the practical reservoir capacity is calculated, and secondly source–sink matching is used for calculating an estimate of the matched capacity and the reservoir development probability. This approach is applied to Belgium, demonstrating how a priority ranking for reservoirs can be obtained based on limited available data and large uncertainties. The results show the Neeroeteren Formation as the most prospective reservoir, followed by the Buntsandstein Formation and the Dinantian reservoirs. The findings indicate that CO2 export to reservoirs in neighbouring countries seems inevitable; still, there is a 70% chance storage will happen in Belgian reservoirs, with an average matched capacity estimate of 110 Mt CO2 . These quantitative results confirm the qualitative resource pyramid classification of potential reservoirs. For Belgium, a high economic risk is attached to reservoir exploration and development. Exploration remains however a necessity if CCS is to be deployed. Furthermore, it is shown that the presented methodology is indeed capable of producing realistic results, and that using expert judgements for reservoir assessments is valid and beneficial.
Located in Library / RBINS Staff Publications
Article Reference Pipeline Design for a Least-cost Router Application for CO2 Transport in the CO2 Sequestration Cycle
Located in Library / RBINS Staff Publications
Inproceedings Reference Quantifying the CO2 storage potential in Belgium: Working with theoretical capacities.
Located in Library / RBINS Staff Publications
Inproceedings Reference CO2 storage opportunities in Belgium
Located in Library / RBINS Staff Publications
Article Reference The first record of Early Devonian ammonoids from Belgium and their stratigraphic significance
The first ammonoids from the Lower Emsian (Devonian) of Belgium are described. They belong to the Anetoceratinae, which show the most plesiomorphic characters of all ammonoids. This is the second report of Early Emsian ammonoids within the Rhenish facies of the Rhenish Slate Mountains (Belgium, Germany), in this case from the Belgian part of the Eifel (Burg Reuland). It highlights the possible importance of ammonoids for the correlation of the Emsian in its traditional German sense and the Emsian in the global sense as delimited by the GSSPs. Newly collected, age-significant brachiopods of the genera Arduspirifer and Euryspirifer and other previously reported fossils indicate a middle or late Early Emsian (Singhofen or Vallendar) age (in German sense) for this locality. We extend the range of Ivoites schindewolfi outside of the Hunsrück Basin and further corroborate an age younger than Ulmen for parts of the Hunsrück Slate.
Located in Library / RBINS Staff Publications
Article Reference Ammonites from the Dababiya Quarry Corehole: Taxonomic notes and age assessment
We describe a small collection of ammonites from the Dababiya Quarry corehole. It is almost entirely composed of heteromorph ammonites, in particular of scaphitids and baculitids. The presence of Indoscaphites pavana (Forbes 1848),which is for the first time reported from Egypt, points to a late to possibly latest Maastrichtian age for the interval DBD 80.36–DBD 99.11 of the Dababiya Quarry core. This is corroborated by preliminary data on planktonic foraminifera.
Located in Library / RBINS Staff Publications
Article Reference Early Eocene frogs from Vastan Lignite Mine, Gujarat, India
The Ypresian Cambay Shale Formation of Vastan Lignite Mine in Gujarat, western India, has yielded a rich vertebrate fauna, including the earliest modern mammals of the Indian subcontinent. Here we describe its assemblage of four frogs,including two new genera and species, based on numerous, diverse and well−preserved ilia and vertebrae. An abundant frog, Eobarbourula delfinoi gen. and sp. nov., with a particular vertebral articulation similar to a zygosphene−zygantrum complex, represents the oldest record of the Bombinatoridae and might have been capable of displaying the Unken reflex. The large non−fossorial pelobatid Eopelobates, known from complete skeletons from the Eocene and Oligocene of Europe, is also identified at Vastan based on a single nearly complete ilium. An abundant “ranid” and a possible rhacophorid Indorana prasadi gen. and sp. nov. represent the earliest records of both families. The Vastan pelobatids and ranids confirm an early worldwide distribution of these families, and the bombinatorids and rhacophorids show possible origins of those clades on the Indian subcontinent.
Located in Library / RBINS Staff Publications