Our Ph.D. student Ulysse just published by French and Belgian colleagues a new rhabdodontid dinosaur with shearing dentition. The new critter is called Matheronodon provincialis. Link to the press release text by The Royal Belgian Institute of Natural Sciences.
Here the abstract of the paper:
Godefroit, Garcia, Gomez, Stein, Cincotta, Lefèvre & Valentin. 2017. Extreme tooth enlargement in a new Late Cretaceous rhabdodontid dinosaur from Southern France. Scientific Reports 7: 13098. doi:10.1038/s41598-017-13160-2
Rhabdodontidae is a successful clade of ornithopod dinosaurs, characteristic of Late Cretaceous continental faunas in Europe. A new rhabdodontid from the late Campanian, of southern France, Matheronodon provincialis gen. et sp. nov., is characterized by the extreme enlargement of both its maxillary and dentary teeth, correlated to a drastic reduction in the number of maxillary teeth (4 per generation in MMS/VBN-02-102). The interalveolar septa on the maxilla are alternately present or resorbed ventrally so as to be able to lodge such enlarged teeth. The rhabdodontid dentition and masticatory apparatus were adapted for producing a strict and powerful shearing action, resembling a pair of scissors. With their relatively simple dentition, contrasting with the sophisticated dental batteries in contemporary hadrosaurids, Matheronodon and other rhabdodontids are tentatively interpreted as specialized consumers of tough plant parts rich in sclerenchyma bers, such as Sabalites and Pandanites.
The "Teaching" section has been updated. Check there regularly to get the slides, syllabus, and data for practicals!
We have been modifying our "Publications" section, adding several links to open access versions of our papers as well as links to freely accessible datasets and supplementary information. Check it out!
Interview de Jean-Marc Marion concernant la nouvelle carte géologique de Malmedy qu'il a réalisé, contenant, peut-être, les plus anciennes roches affleurant en Belgique!
We have a new paper just published in Current Biology, dealing with a new pliosaur from the Late Hauterivian of Russia, Luskhan itilensis, and analyzing the ecomorphological convergences among short-necked plesiosaurs.
Quite an important press coverage (see icon below) and some videos interviews as well: www.rtl.be/info/Video/629641.aspx www.rtc.be/video/info/edition-du-26-05-2017_1495279_307.html
Fischer V, Benson RBJ, Zverkov NG, Soul LC, Arkhangelsky MS, Lambert O, Stenshin IM, Uspensky GN, Druckenmiller PS. 2017. Plasticity and convergence in the evolution of short-necked plesiosaurs. Current Biology 27 doi:10.1016/j.cub.2017.04.052.
Plesiosaurs were the longest-surviving group of secondarily marine tetrapods, comparable in diversity to today’s cetaceans. During their long evolutionary history, which spanned the Jurassic and the Cretaceous (201 to 66 Ma), plesiosaurs repeatedly evolved long- and short-necked body plans. Despite this postcranial plasticity, short-necked plesiosaur clades have traditionally been regarded as being highly constrained to persistent and clearly distinct ecological niches: advanced members of Pliosauridae (ranging from the Middle Jurassic to the early Late Cretaceous) have been characterised as apex predators, whereas members of the distantly related clade Polycotylidae (middle–Late Cretaceous) were thought to have been fast-swimming piscivores. We report a new, highly unusual pliosaurid from the Early Cretaceous of Russia that shows close convergence with the cranial structure of polycotylids: Luskhan itilensis gen. et sp. nov. Using novel cladistic and ecomorphological data, we show that pliosaurids iteratively evolved polycotylid-like cranial morphologies from the Early Jurassic until the Early Cretaceous. This underscores the ecological diversity of derived pliosaurids and reveals a more complex evolutionary history than their iconic representation as gigantic apex predators of Mesozoic marine ecosystems suggests. Collectively, these data demonstrate an even higher degree of morphological plasticity and convergence in the evolution of plesiosaurs than previously thought, and suggest the existence of an optimal ecomorphology for short-necked piscivorous plesiosaurs through time and across phylogeny.
Fischer 2016. Taxonomy of Platypterygius campylodon and the diversity of the last ichthyosaurs. PeerJ 4:e2604; DOI 10.7717/peerj.2604. Freely available here: peerj.com/articles/2604/?td=bl
A complex and confusing taxonomy has concealed the diversity dynamics of Cretaceous ichthyosaurs (Reptilia) for decades. The near totality of Albian-Cenomanian remains from Eurasia has been assigned, by default, to the loosely defined entity Platypterygius campylodon, whose holotype was supposed to be lost. By thoroughly examining the Cenomanian ichthyosaur collections from the UK, I redescribe the syntypic series of Platypterygius campylodon. This material, along with a handful of other coeval remains, is diagnostic and seemingly differs from the vast majority of Cretaceous remains previously assigned to this taxon. A lectotype for Platypterygius campylodon is designated and I reassign this species to Pervushovisaurus campylodon nov. comb. The feeding ecology of this species is assessed and conforms to the scenario of an early Cenomanian diversity drop prior to the latest Cenomanian final extinction.
Figure 3 Rostra referred to Pervushovisaurus campylodon (Carter, 1846a). (AD) CAMSM TN282, a partial rostrum possibly from a juvenile specimen. (A) Ventrolateral view. (BC) Details of the teeth. (D) Detail of the premaxillary overbite. (EF) CAMSM B20671a, a partial rostrum of a large specimen. (E) Lateral view. (F) detail of the mid-snout teeth. (G) Detail of the premaxillary overbite. Fischer 2016 PeerJ
Our former PhD student Sébastien Olive just published novel tetrapod remains from the Famenian of Belgium! The publication Olive & al 2016 Palaeontology can be accessed here!
Une carte géologique produite par notre cartographe sénior Jean-Marc Marion et un ancien du labo, Bernard Mottequin, était exposé au Palais Royal (!) pour une exposition sur la cartographie. Détails de l'expo ici www.cartographiae.be
De gauche à droite: Bernard Mottequin, la carte géologique Louveignié-Spa, Valentin Fischer, Isaure Scavezzoni, Julien Denayer, Cyrille Prestianni et Jean-Marc Marion
J'étais invité hier sur le Forum de Midi Première pour discuter de la "nouvelle" époque géologique de l'Anthropocène avec Pr. Edwin Zaccai de l'ULB. Interview à (ré-)écouter ici.
By our former postdoc Sébastien Olive, congrats to him!
Olive, S., Clement, G. Daeschler, E. B. & Dupret, V. 2016. Placoderm Assemblage from the Tetrapod-Bearing Locality of Strud (Belgium, Upper Famennian) Provides Evidence for a Fish Nursery. PLoS ONE 11(8): e0161540. doi:10.1371/journal.pone.0161540
Strud nursery. © Olive et al. 2016.