Project 3919: Y. Rollot, S. W. Evers, W. G. Joyce. 2021. A redescription of the Late Jurassic (Tithonian) turtle Uluops uluops and a new phylogenetic hypothesis of Paracryptodira. Swiss Journal of Palaeontology. 140 (1):none yet.
Specimen: † Uluops uluops (UCM:53971)
View: Uluops uluops, UCM 53971, left lateral view


We study the Late Jurassic (Tithonian) turtle Uluops uluops using micro-computed tomography scans to investigate the cranial anatomy of paracryptodires, and provide new insights into the evolution of the internal carotid artery and facial nerve systems, as well as the phylogenetic relationships of this group. We demonstrate the presence of a canalis caroticus lateralis in Uluops uluops, the only pleurosternid for which a palatine artery canal can be confidently identified. Our phylogenetic analysis retrieves Uluops uluops as the earliest branching pleurosternid, Helochelydridae within Pleurosternidae, and Compsemydidae including Kallokibotion bajazidi within Baenidae, which suggests at least two independent losses of the palatine artery within paracryptodires. We expect future studies will provide additional insights into the evolution of the circulation system of paracryptodires, as well as clarifying relationships along the turtle stem.

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Article DOI: 10.1186/s13358-021-00234-y

Project DOI: 10.7934/P3919,
This project contains
  • 38 Media
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MorphoBank Project 3919

    Authors' Institutions

    • Université de Fribourg (University of Fribourg)


    member name taxa specimens media
    Yann Rollot
    Project Administrator
    Serjoscha Evers
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    Walter Joyce
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