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    Université de Fribourg

    Cranial osteology of the early cretaceous turtle Pleurosternon bullockii (paracryptodira: pleurosternidae)

    Evers, Serjoscha W. ; Rollot, Yann ; Joyce, Walter G.

    In: PeerJ, 2020, vol. 8, p. e9454

    Pleurosternon bullockii is a turtle from the Early Cretaceous of Europe known from numerous postcranial remains. Only one skull has so far been referred to the species. Pleurosternon bullockii belongs to a group of turtles called pleurosternids, which is thought to include several poorly known taxa from the Late Jurassic and Early Cretaceous of Europe and North America. Pleurosternids and...

    Université de Fribourg

    An alternative interpretation of Peltochelys duchastelii as a paracryptodire

    Joyce, Walter G. ; Rollot, Yann

    In: Fossil Record, 2020, vol. 23, no. 1, p. 83–93

    Peltochelys duchastelii is an enigmatic turtle from Early Cretaceous (middle Barremian–early Aptian) Sainte-Barbe Formation of Bernissart, Belgium. In more recent literature, there has been strong support for the trionychian affinities of this taxon, but this interpretation is less consistent with external data, in particular biogeography and temporal considerations. We provide a...

    Université de Fribourg

    A new species of baenid turtle from the Early Cretaceous Lakota Formation of South Dakota

    Joyce, Walter G. ; Rollot, Yann ; Cifelli, Richard L.

    In: Fossil Record, 2020, vol. 23, no. 1, p. 1–13

    Baenidae is a clade of paracryptodiran turtles known from the late Early Cretaceous to Eocene of North America. The proposed sister-group relationship of Baenidae to Pleurosternidae, a group of turtles known from sediments dated as early as the Late Jurassic, suggests a ghost lineage that crosses the early Early Cretaceous. We here document a new species of paracryptodiran turtle, Lakotemys...

    Université de Fribourg

    A description of the skull of eubaena cephalica (hay, 1904) and new insights into the cranial circulation and innervation of baenid turtles

    Rollot, Yann ; Lyson, Tyler R. ; Joyce, Walter G.

    In: Journal of Vertebrate Paleontology, 2018, vol. 38, no. 3, p. e1474886

    The internal carotid system has played an important role in the systematics of fossil turtles, including baenids. A new, almost perfectly preserved specimen of Eubaena cephalica provides an opportunity to explore for the first time the cranial circulation and innervation of this taxon using CT (computed tomography) scans. We here document that the skull possesses a well-developed, branching...