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Article Reference Presence of the large aquatic snake Palaeophis africanus in the middle Eocene marine margin of the Congo Basin, Cabinda, Angola
Ten isolated snake vertebrae from Landana and Sassa-Zao, Cabinda Exclave, Angola, present a ‘‘primitive” grade morphology with a weak lateral compression and do not belong to Palaeophis aff. typhaeus as originally referred to. They well belong to a single taxon and are here attributed to Palaeophis africanus for which the intracolumnar variation is described and illustrated. This species is Lutetian (middle Eocene) in age and originates from a marine coastal environment confirming again the aquatic capabilities of palaeophiid snakes. It represents the third largest species of Palaeophis with P. colossaeus and P. maghrebianus to which it is closely related in our tentative phylogenetic analysis, indicating that these three taxa could belong to an African clade. This study also contributes to the debate on the existence of primitive and advanced grades among palaeophiid snakes. Palaeophis presents laterally compressed anterior trunk vertebrae that could have been often erroneously considered as representing advanced grade species and potential parataxonomy.
Located in Library / RBINS Staff Publications 2021
Article Reference A new basal raoellid artiodactyl (Mammalia) from the middle Eocene Subathu Group of Rajouri District, Jammu and Kashmir, northwest Himalaya, India
A new artiodactyl of moderate size, Rajouria gunnelli nov. gen., nov. sp., is described on the basis of several dentaries, maxillae and isolated teeth from the middle Eocene Subathu Group of the Kalakot area, Rajouri District, Jammu and Kashmir, India. Despite its general resemblance with the family Dichobunidae by the retention of a paraconid on m1-2 and a simple P4 where endocristids do not form an anterior loph, this taxon shares with Raoellidae two unambiguous characters: the presence of a hypoconid on p4, and an asymmetrical P4. The phylogenetic position of the new taxon within the Cetacea–Raoellidae clade is strongly supported by seven non ambiguous synapomorphies, among which a cristid obliqua on lower molars anteriorly pointing towards the postectoprotocristid, and a P3 with only two roots. The presence of a new basal raoellid in the middle Eocene Subathu Group sheds new light on the phylogeny and paleobiogeography of raoellid artiodactyls.
Located in Library / RBINS Staff Publications 2021
Article Reference Coastal lake sediments reveal 5500 years of tsunami history in south central Chile
Located in Library / RBINS Staff Publications 2017
Article Reference Larger earthquakes recur more periodically: New insights in the megathrust earthquake cycle from lacustrine turbidite records in south central Chile
Located in Library / RBINS Staff Publications 2017
Article Reference Path and site effects deduced from merged transfrontier internet macroseismic data of two recent M4 earthquakes in NW Europe using a grid cell approach
Located in Library / RBINS Staff Publications 2017
Article Reference A new lithostratigraphy for the Quaternary sandy aeolian deposits in Belgium: revising the Gent formation
Located in Library / RBINS Staff Publications 2017
Book Reference Het meest duurzame materiaal van België. Belgisch Porfier.
Located in Library / RBINS Staff Publications 2022
Article Reference Method assessment and observer variation in age estimation: A comparative analysis of the Suchey-Brooks and the İşcan methods on an archaeological medieval population
Age-at-death estimation methods have faced challenges in their applicability to past populations. This study aims to evaluate the assessment and observer variability of the Suchey-Brooks (SB) and İşcan methods within archaeological contexts. Our sample consisted of 400 individuals from the medieval cemetery of the Dunes Abbey in Koksijde, Belgium. The skeletal remains exhibited good preservation, especially for the İşcan methods, which showed higher sensitivity to preservation conditions. Intra- and inter-observer variation were investigated using Spearman correlation coefficients, Wilcoxon paired ranks test, and Cohen's kappa test. The Spearman coefficient revealed a strong positive correlation, with a moderate to almost excellent kappa coefficient for both intra- and inter-observer error. Overall, the SB method displayed better inter-observer agreement, while the İşcan method presented better intra-observer agreement. Applying these methods to younger individuals resulted in less variability. Certain descriptive phase categories, such as phase III for the SB method and phase 3 and 4 for the İşcan methods, seemed problematic. Only 188 sufficiently preserved individuals could be scored using both the SB and the İşcan methods. They were classified into age groups, and the methods assessment were evaluated using the same statistical approach. The Spearman correlation coefficient indicated consistent age group attribution between the two methods (rho = 0.92), with a moderate to almost excellent agreement (k = 0.45; wk = 0.91). Overall, the two methods mainly differ by only one age group, except for older adults. The SB method tended to assign older age groups compared to İşcan's method, leading to effective overestimation.
Located in Library / RBINS Staff Publications 2023
Article Reference Periphytic community structure of Ostracoda (Crustacea) in the river-floodplain system of the Upper Paraná River
Aim: We assessed the effect of environmental factors on the structure of periphytic ostracods communities along the river-floodplain system of the Upper Paraná River. We predict that the higher distance from Porto Primavera dam downstream would lead to higher diversity and density of the ostracods. Methods: Periphytic ostracods (associated with root systems of the floating Eichhornia spp) were sampled during November 2013 to May 2015. Three samples were collected at each sampling site (channel of the Paraná River, tributaries and lakes). Eichhornia plants were removed from the water by hand and the plants were placed in a plastic bucket. Roots were washed for the removal of ostracods, and samples were filtered through a hand net with 160 µm mesh size. Results: The faunistic survey recorded 44 ostracods species and richness estimators indicated that sampling effort appears to be suitable to reveal the diversity of ostracods in this studied area. The highest richness and density were observed in the stretch downstream of the dam in the main channel of Paraná River and in the lakes. Beta diversity was not significantly different along the longitudinal gradient downstream and higher similarity of ostracods species composition was observed in the lakes located in the stretch downstream of the dam. Conclusions: An increase in the richness and density of ostracods were recorded in the sections downstream of the Paraná River, evidencing the importance of undammed tributaries on the ostracods community. The similarity of beta diversity amongst sampling sites may be owing to permanent hydrological connectivity amongst these environments, favouring the exchange of organisms mainly through the drift of free-floating macrophytes, and owing to the passive dispersal of drought resistant eggs of ostracods. Local abiotic factors had significant effects on abundance and distribution of some ostracod species.
Located in Library / RBINS Staff Publications 2017
Article Reference Updating Frasnian miospore zonation from the Boulonnais (Northern France) and comparison with new data from the Upper Palaeozoic cover on the Brabant Massif (Western Belgium).
Located in Library / RBINS Staff Publications 2021