ANQUETIN Jérémy's profile
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ANQUETIN JérémyORCID_LOGO

  • Mesozoic Research Group, Jurassica Museum, Porrentruy, Switzerland
  • Comparative anatomy, Macroevolution, Morphological evolution, Morphometrics, Phylogenetics, Systematics, Taxonomy, Vertebrate paleontology
  • recommender, administrator, manager

Recommendation:  1

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**Current Position** Since 2015: Senior Lecturer, Jurassica Museum, Porrentruy, Switzerland **Employment History** 2013–2015 Researcher, Section d’archéologie et paléontologie, République et Canton du Jura, Porrentruy, Switzerland 2011–2013 Freelance scientific translator, Saint Aignan, France 2009–2011 Postdoctoral researcher, Department of Earth History, Muséum national d’histoire naturelle, Paris, France 2009–2010 Visiting Lecturer, Department of Geology, University of Rouen, France 2008–2009 Assistant Lecturer, Department of Geology, University of Rouen, France **Education** 2016 Venia legendi (Habilitation), University of Fribourg, Fribourg, Switzerland 2005–2009 PhD Vertebrate Palaeontology, University College London (UCL) and Natural History Museum, London, UK *PhD Thesis: A new stem turtle from the Middle Jurassic of the Isle of Skye, Scotland, and a reassessment of basal turtle relationships* 2004–2005 Master 2 Systematics, Evolution, Paleontology, Muséum national d’histoire naturelle, Paris, France *MSc Thesis: Anatomie crânienne des Chalicotheriinae (Perissodactyla, Mammalia) du Miocène moyen et supérieur d’Europe ; implications phylogénétiques* 2003–2004 Master 1 Earth Sciences, speciality Paleontology, University of Poitiers, France

Recommendation:  1

13 Jul 2023
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A baenid turtle shell from the Mesaverde Formation (Campanian, Late Cretaceous) of Park County, Wyoming, USA

New baenid turtle material from the Campanian of Wyoming

Recommended by based on reviews by Heather F. Smith and Brent Adrian

The Baenidae form a diverse extinct clade of exclusively North American paracryptodiran turtles known from the Early Cretaceous to the Eocene (Hay, 1908; Gaffney, 1972; Joyce and Lyson, 2015). Their fossil record was recently extended down to the Berriasian-Valanginian (Joyce et al. 2020), but the group probably originates in the Late Jurassic because it is usually retrieved as the sister group of Pleurosternidae in phylogenetic analyses. However, baenids only became abundant during the Late Cretaceous, when they are restricted in distribution to the western United States, Alberta and Saskatchewan (Joyce and Lyson, 2015).

During the Campanian, baenids are abundant in the northern (Alberta, Montana) and southern (Texas, New Mexico, Utah) parts of their range, but in the middle part of this range they are mostly represented by poorly diagnosable shell fragments. In their new contribution, Wu et al. (2023) describe a new articulated baenid specimen from the Campanian Mesaverde Formation of Wyoming. Despite its poor preservation, they are able to confidently assign this partial shell to Neurankylus sp., hence definitively confirming the presence of baenids and Neurankylus in this formation. Incidentally, this new specimen was found in a non-fluvial depositional environment, which would also confirm the interpretation of Neurankylus as a pond turtle (Hutchinson and Archibald, 1986; Sullivan et al., 1988; Wu et al., 2023; see also comments from the second reviewer).

The study of Wu et al. (2023) also includes a detailed account of the state of the fossil when it was discovered and the subsequent extraction and preparation procedures followed by the team. This may seem excessive or out of place to some, but I agree with the authors that such information, when available, should be more commonly integrated into scientific articles describing new fossil specimens. Preparation and restoration can have a significant impact on the perceived morphology. This must be taken into account when working with fossil specimens. The chemicals or products used to treat, prepare, or consolidate the specimens are also important information for long-term curation. Therefore, it is important that such information is recorded and made available for researchers, curators, and preparators.

References

Gaffney, E. S. (1972). The systematics of the North American family Baenidae (Reptilia, Cryptodira). Bulletin of the American Museum of Natural History, 147(5), 241–320.

Hay, O. P. (1908). The Fossil Turtles of North America. Carnegie Institution of Washington, Washington, D.C. https://doi.org/10.5962/bhl.title.12500

Hutchison, J. H., and Archibald, J. D. (1986). Diversity of turtles across the Cretaceous/Tertiary boundary in Northeastern Montana. Palaeogeography, Palaeoclimatology, Palaeoecology, 55(1), 1–22. https://doi.org/10.1016/0031-0182(86)90133-1

Joyce, W. G., and Lyson, T. R. (2015). A review of the fossil record of turtles of the clade Baenidae. Bulletin of the Peabody Museum of Natural History, 56(2), 147–183. https://doi.org/10.3374/014.058.0105

Joyce, W. G., Rollot, Y., and Cifelli, R. L. (2020). A new species of baenid turtle from the Early Cretaceous Lakota Formation of South Dakota. Fossil Record, 23(1), 1–13. https://doi.org/10.5194/fr-23-1-2020

Sullivan, R. M., Lucas, S. G., Hunt, A. P., and Fritts, T. H. (1988). Color pattern on the selmacryptodiran turtle Neurankylus from the Early Paleocene (Puercan) of the San Juan Basin, New Mexico. Contributions in Science, 401, 1–9. https://doi.org/10.5962/p.241286

Wu, K. Y., Heuck, J., Varriale, F. J., and Farke, A. (2023). A baenid turtle shell from the Mesaverde Formation (Campanian, Late Cretaceous) of Park County, Wyoming, USA. PaleorXiv, uk3ac, ver. 5, peer-reviewed and recommended by Peer Community In Paleontology. https://doi.org/10.31233/osf.io/uk3ac

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ANQUETIN JérémyORCID_LOGO

  • Mesozoic Research Group, Jurassica Museum, Porrentruy, Switzerland
  • Comparative anatomy, Macroevolution, Morphological evolution, Morphometrics, Phylogenetics, Systematics, Taxonomy, Vertebrate paleontology
  • recommender, administrator, manager

Recommendation:  1

Reviews:  0

Areas of expertise
**Current Position** Since 2015: Senior Lecturer, Jurassica Museum, Porrentruy, Switzerland **Employment History** 2013–2015 Researcher, Section d’archéologie et paléontologie, République et Canton du Jura, Porrentruy, Switzerland 2011–2013 Freelance scientific translator, Saint Aignan, France 2009–2011 Postdoctoral researcher, Department of Earth History, Muséum national d’histoire naturelle, Paris, France 2009–2010 Visiting Lecturer, Department of Geology, University of Rouen, France 2008–2009 Assistant Lecturer, Department of Geology, University of Rouen, France **Education** 2016 Venia legendi (Habilitation), University of Fribourg, Fribourg, Switzerland 2005–2009 PhD Vertebrate Palaeontology, University College London (UCL) and Natural History Museum, London, UK *PhD Thesis: A new stem turtle from the Middle Jurassic of the Isle of Skye, Scotland, and a reassessment of basal turtle relationships* 2004–2005 Master 2 Systematics, Evolution, Paleontology, Muséum national d’histoire naturelle, Paris, France *MSc Thesis: Anatomie crânienne des Chalicotheriinae (Perissodactyla, Mammalia) du Miocène moyen et supérieur d’Europe ; implications phylogénétiques* 2003–2004 Master 1 Earth Sciences, speciality Paleontology, University of Poitiers, France