Université de Fribourg

The comparative osteology of Plesiochelys bigleri n. sp., a new coastal marine turtle from the Late Jurassic of Porrentruy (Switzerland)

Püntener​, Christian ; Anquetin, Jérémy ; Billon-Bruyat, Jean-Paul

In: PeerJ, 2017, vol. 5, p. e3482

During the Late Jurassic, several groups of eucryptodiran turtles inhabited the shallow epicontinental seas of Western Europe. Plesiochelyidae are an important part of this first radiation of crown-group turtles into coastal marine ecosystems. Fossils of Plesiochelyidae occur in many European localities, and are especially abundant in the Kimmeridgian layers of the Swiss Jura Mountains (Solothurn...

Université de Fribourg

Stable isotope study of a new chondrichthyan fauna (Kimmeridgian, Porrentruy, Swiss Jura): an unusual freshwater-influenced isotopic composition for the hybodont shark Asteracanthus

Leuzinger, Léa ; Kocsis, L. ; Billon-Bruyat, Jean-Paul ; Spezzaferri, Silvia ; Vennemann, T.

In: Biogeosciences, 2016, vol. 12, no. 23, p. 6945–6954

Chondrichthyan teeth (sharks, rays, and chimaeras) are mineralized in isotopic equilibrium with the surrounding water, and parameters such as water temperature and salinity can be inferred from the oxygen isotopic composition (δ18Op) of their bioapatite. We analysed a new chondrichthyan assemblage, as well as teeth from bony fish (Pycnodontiformes). All specimens are from Kimmeridgian coastal...

Bibliothèque cantonale jurassienne

First record of a pterosaur landing trackway

Mazin, Jean-Michel ; Billon-Bruyat, Jean-Paul ; Padian, Kevin

In: Proceedings of the Royal Society of London. Series B, Biological sciences, 2009, vol. 276, p. 3881-3886

Université de Fribourg

Taxonomy and phylogeny of the turtle Tropidemys langii Rütimeyer, 1873, based on new specimens from the Kimmeridgian of the Swiss Jura Mountains

Püntener, Christian ; Billon-Bruyat, Jean-Paul ; Bocat, Loïc ; Berger, Jean-Pierre ; Joyce, Walter G.

In: Journal of Vertebrate Paleontology, 2014, vol. 34, no. 2, p. 353–374

The fossil turtle Tropidemys langii is a representative of Plesiochelyidae, a traditionally recognized group of Late Jurassic turtles diagnosed by the presence of three cervical scutes and adapted to life in the sea. Tropidemys langii was previously only known from fossilized carapaces and, possibly, plastra from Europe, most notably the famous ‘Solothurn Turtle Limestone’ of Switzerland. Due...

Bibliothèque cantonale jurassienne

Tetrapods from the Late Jurassic lithographic limestones and Plattenkalke of Western Europe : an updated comparative review

Billon-Bruyat, Jean-Paul ; Marty, Daniel ; Bocat, Loïc

In: 5th International Symposium on Lithographic Limestone and Plattenkalk : abstracts and field guides, 2009, p. 17-18

Bibliothèque cantonale jurassienne

First record of a non-pterodactyloid pterosaur (reptilia: archosauria) from switzerland

Billon-Bruyat, Jean-Paul

In: Eclogae geologicae Helvetiae : recueil périodique de la Société géologique suisse = Mitteilungen der Schweiz. geologischen Gesellschaft, 2005/98/313/