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    Université de Fribourg

    A revision of the pelomedusoid turtle Jainemys pisdurensis from the Late Cretaceous (Maastrichtian) Lameta Formation of India

    Joyce, Walter G. ; Bandyopadhyay, Saswati

    In: PeerJ, 2020, vol. 8, p. e9330

    Background: Jainemys pisdurensis comb. nov. is an extinct pleurodiran turtle from the Late Cretaceous (Maastrichtian) of India, previously referred to Carteremys and Shweboemys. The holotype, an eroded skull, had been collected near the village of Pisdura, south of Nagpur, in Maharashtra State, while all referred shell material originates from coeval sediments exposed at the nearby village of...

    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...

    Université de Fribourg

    The first soft-shelled turtle from the Jehol Biota of China

    Lia, Lu ; Joyce, Walter G. ; Liu, Jun

    In: Journal of Vertebrate Paleontology, 2015, vol. 35, no. 2, p. e909450

    A new turtle from the Early Cretaceous (Aptian) Jiufotang Formation of western Liaoning, China, Perochelys lamadongensis, gen. et sp. nov., represents the first species of soft-shelled turtle from the Jehol Biota. The new taxon is diagnosed by the combination of the following characters: nuchal bone about five times wider than long; preneural absent; reversal of the orientation in the neural...

    Université de Fribourg

    Osteology, relationships, and ecology of Annemys (Testudines, Eucryptodira) from the Late Jurassic of Shar Teg, Mongolia, and phylogenetic definitions for Xinjiangchelyidae, Sinemydidae, and Macrobaenidae

    Rabi, Márton ; Sukhanov, Vladimir B. ; Egorova, Vera N. ; Danilov, Igor ; Joyce, Walter G.

    In: Journal of Vertebrate Paleontology, 2014, vol. 34, no. 2, p. 327–352

    A complete description of the xinjiangchelyid turtles Annemys levensis and A. latiens is provided, based on all available material from the Upper Jurassic type locality of Shar Teg, Mongolia. Annemys latiens was previously known almost exclusively from shell material, but an undescribed skull from Shar Teg is referable to this species and its distinct morphology confirms the presence of two taxa...