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Université de Fribourg

Feeding biomechanics suggests progressive correlation of skull architecture and neck evolution in turtles

Ferreira, Gabriel S. ; Lautenschlager, Stephan ; Evers, Serjoscha W. ; Pfaff, Cathrin ; Kriwet, Jürgen ; Raselli, Irena ; Werneburg, Ingmar

In: Scientific Reports, 2020, vol. 10, p. 5505

The origin of turtles is one of the most long-lasting debates in evolutionary research. During their evolution, a series of modifications changed their relatively kinetic and anapsid skull into an elongated akinetic structure with a unique pulley system redirecting jaw adductor musculature. These modifications were thought to be strongly correlated to functional adaptations, especially to bite...

Université de Fribourg

Estimating the phylogeny of geoemydid turtles (Cryptodira) from landmark data: an assessment of different methods

Ascarrunz​, Eduardo ; Claude, Julien ; Joyce, Walter G.

In: PeerJ, 2019, vol. 7, p. e7476

Background: In the last 20 years, a general picture of the evolutionary relationships between geoemydid turtles (ca. 70 species distributed over the Northern hemisphere) has emerged from the analysis of molecular data. However, there is a paucity of good traditional morphological characters that correlate with the phylogeny, which are essential for the robust integration of fossil and...

Université de Fribourg

Fossil amphibians and reptiles from Plakias, Crete: A glimpse into the earliest late Miocene herpetofaunas of southeastern Europe

Georgalis, Georgios L. ; Villa, Andrea ; Vlachos, Evangelos ; Delfino, Massimo

In: Geobios, 2016, vol. 49, no. 6, p. 433–444

Fossil amphibians and reptiles from the earliest late Miocene (early Tortonian, MN 9) of Plakias (Crete, Greece) are described in this paper. Most of the material is fragmentary, precluding precise taxonomic assignment. Nevertheless, the herpetofauna of Plakias is here shown to be diverse, comprising at least six different taxa: an alytid anuran, a crocodilian, two turtles (a pan-trionychid...

Université de Fribourg

A revision of the trionychid turtle Procyclanorbis sardus Portis, 1901 from the late Miocene of Sardinia (Italy) = Une révision de la tortue trionychidé Procyclanorbis sardus Portis, 1901 du Miocène supérieur de Sardaigne (Italie)

Georgalis, Georgios L. ; Zoboli, Daniel ; Pillola, Gian Luigi ; Delfino, Massimo

In: Annales de Paléontologie, 2017, vol. 103, no. 2, p. 127–134

Procyclanorbis sardus Portis, 1901 est la première tortue trionychidé fossile décrite en Sardaigne. Ce taxon du Miocène supérieur a été initialement considéré comme ayant des affinités avec les cyclanorbines d’Afrique et d’Asie du Sud. Nous décrivons ici en détail et figurons l’holotype de cette espèce, qui a subi une importante dégradation depuis sa publication originale. Une...

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

A review of the fossil record of old world turtles of the clade pan-trionychidae

Georgalis, Georgios L. ; Joyce, Walter G.

In: Bulletin of the Peabody Museum of Natural History, 2017, vol. 58, no. 1, p. 115–208

Turtles of the clade Pan-Trionychidae have a rich fossil record in the Old World, ranging from the Early Cretaceous (Hauterivian) to the Holocene. The clade most probably originated in Asia during the Early Cretaceous but spread from there to the Americas and Europe by the Late Cretaceous, to India and Australia by the Eocene, and to Afro-Arabia by the Neogene. The presence of a single...