New Late Jurassic turtle skulls from Switzerland and the diversity of the Plesiochelyidae

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New Late Jurassic turtle skulls from Switzerland and the diversity of the Plesiochelyidae Jérémy Anquetin Section d archéologie et paléontologie Office de la culture République et Canton du Jura Porrentruy, Switzerland Meeting of the Central European Turtle Evolutionary Biologists December 2nd, 2014, Zürich

Context Coastal marine turtles: Plesiochelyidae, Thalassemydidae, Eurysternidae Paleogeographical reconstruction for Europe during the Late Jurassic Ron Blakey, Colorado Plateau Geosystems, http://cpgeosystems.com

Context Pleurodira Paracryptodira Plesiochelyidae Thalassemydidae Eurysternidae Cryptodira Panpleurodira Eucryptodira Pancryptodira Testudines Uncertain relationships Confused taxonomy

Context TITHONIAN Portlandemys mcdowelli Plesiochelys planiceps [ Thalassemys moseri ] [Solnhofia parsonsi ] KIMMERIDGIAN Plesiochelys etalloni New skulls (3 taxa) Paleogeographical reconstruction for Europe during the Late Jurassic Ron Blakey, Colorado Plateau Geosystems, http://cpgeosystems.com

Geological setting Solothurn Zürich Solothurn Turtle Limestone (Kimmeridgian) Franz Joseph Hugi (1791 1855) Cuvier. 1824.

Geological setting Solothurn Zürich Solothurn Turtle Limestone (Kimmeridgian) Rütimeyer. 1873. Bräm. 1965. Anquetin et al. 2014.

Geological setting Porrentruy: Paléontologie A16 (Kimmeridgian) 2000 2018: rescue paleontology 40,000+ fossils 675 dinosaur trackways 14,000+ tracks

Geological setting Porrentruy Zürich Porrentruy: A new diverse turtle fauna (Kimmeridgian) 80+ shells 6 crania 4 mandibles 1000+ isolated remains 8 taxa 4 new species

Geological setting Lower Kimmeridgian Upper Kimmeridgian Stages Reuchenette Formations Vabenau Banné Courtedoux Chevenez (non publié) Members Regional units Calcaires et marnes à Nanogyra virgula sup. Calcaires gris et blancs sup. Calcaires à coraux Marnes à N. virgula inf. Calcaires à Corbis Calcaires à ptérocères sup. Marnes à ptérocères Calcaires à ptérocères inf. Couches à nautiles Calcaires à Thalassinoides Jank et al. 2006 Oyster Limestones Upper Grey and White Limestones Coral Limestones Virgula Marls Nerinean Limestones Banné Marls Lower Grey and White Limestones Autissiodorensis Nautilidenschichten Thalassinoides Limestones Ammonites zonation Eudoxus Baylei Cymodoce Mutabilis 100 50 Lithology Solothurn Turtle Limestone (Autossiodorensis zone) Virgula Marls (Eudoxus zone) Banné Marls (Cymodoce zone) 0m Lefort et al. 2014. In prep.

Solothurn

Taxon 1: Plesiochelys etalloni 1 cm Plesiochelys etalloni MH 435 in lateral (left) and ventral (right) view 1 skull from Glovelier 4 skulls from Solothurn Anquetin et al. 2014. PeerJ

Taxon 1: Plesiochelys etalloni 1 cm Plesiochelys etalloni NMS 40870 in dorsal (left) and ventral (right) view Anquetin et al. In prep.

Taxon 1: Plesiochelys etalloni 1 cm Anquetin et al. In prep. Plesiochelys etalloni NMS 40870 in ventral view Plesiochelys planiceps OUMNH J.1582 (holotype) in ventral view

Taxon 1: Plesiochelys etalloni 1 cm Anquetin et al. In prep. Plesiochelys etalloni NMS 40870 in ventral view Plesiochelys planiceps OUMNH J.1582 (holotype) in ventral view

Taxon 1: Plesiochelys etalloni 1 cm Anquetin et al. In prep. Plesiochelys etalloni NMS 40870 in ventral view Plesiochelys planiceps OUMNH J.1582 (holotype) in ventral view

Taxon 1: Plesiochelys etalloni 1 cm Anquetin et al. In prep. Plesiochelys etalloni NMS 40870 in ventral view Plesiochelys planiceps OUMNH J.1582 (holotype) in ventral view

Taxon 1: Plesiochelys etalloni 1 cm Anquetin et al. In prep. Plesiochelys etalloni NMS 40870 in ventral view Plesiochelys planiceps OUMNH J.1582 (holotype) in ventral view

Taxon 1: Plesiochelys etalloni 1 cm Plesiochelys etalloni NMS 40871 in dorsal (left), left (middle), and medial (right) views Anquetin et al. In prep.

Taxon 1: Plesiochelys etalloni 1 cm Plesiochelys etalloni NMS 40871 in dorsal (left), left (middle), and medial (right) views Anquetin et al. In prep.

Taxon 1: Plesiochelys etalloni 1 cm Plesiochelys etalloni NMS 40871 in dorsal (left), left (middle), and medial (right) views Anquetin et al. In prep.

Porrentruy

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN BSY009-708, cranium in dorsal (left) and ventral (right) views Portlandemys mcdowelli NHMUK R2914, cranium in dorsal (left) and ventral (right) views Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN BSY009-708, cranium in dorsal (left) and ventral (right) views Portlandemys mcdowelli NHMUK R2914, cranium in dorsal (left) and ventral (right) views Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN BSY009-708, cranium in dorsal (left) and ventral (right) views Portlandemys mcdowelli NHMUK R2914, cranium in dorsal (left) and ventral (right) views Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN BSY009-708, cranium in dorsal (left) and ventral (right) views Portlandemys mcdowelli NHMUK R2914, cranium in dorsal (left) and ventral (right) views Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 5 mm Portlandemys n. sp. MJSN BSY009-708, close-up view of the dorsum sellae and sella turcica 1 cm Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 5 mm Portlandemys n. sp. MJSN BSY009-708, close-up view of the dorsum sellae and sella turcica 1 cm Anquetin et al. In prep. (not to scale)

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN SCR011-411, mandible in dorsal (up) and lateral (bottom) views Portlandemys mcdowelli NHMUK R2914, mandible in dorsal (up) and lateral (bottom) views Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN SCR011-411, mandible in dorsal (up) and lateral (bottom) views Portlandemys mcdowelli NHMUK R2914, mandible in dorsal (up) and lateral (bottom) views Anquetin et al. In prep.

Taxon 2: Portlandemys n. sp. 2 cm Portlandemys n. sp. MJSN SCR011-411, mandible in dorsal (up) and lateral (bottom) views Portlandemys mcdowelli NHMUK R2914, mandible in dorsal (up) and lateral (bottom) views Anquetin et al. In prep.

Taxon 3: new plesiochelyid 1 cm 1 cm New taxon MJSN TCH006-1451, cranium in ventral view New taxon MJSN TCH007-252, cranium in ventral (left) and dorsal (right) views 10 cm Anquetin & Püntener. In prep. New taxon MJSN BSY006-307, carapace (left) and plastron (right)

Taxon 3: new plesiochelyid 1 cm New taxon MJSN TCH006-1451, cranium in dorsal (left) and ventral (right) views Anquetin & Püntener. In prep.

Taxon 3: new plesiochelyid 1 cm New taxon MJSN TCH006-1451, cranium in dorsal (left) and ventral (right) views Anquetin & Püntener. In prep.

Taxon 3: new plesiochelyid 1 cm New taxon MJSN TCH006-1451, closeup of the dorsum sellae and sella turcica Plesiochelys etalloni NMS 40871 in dorsal view Anquetin & Püntener. In prep.

Taxon 3: new plesiochelyid 1 cm New taxon MJSN TCH006-1451, closeup of the dorsum sellae and sella turcica Plesiochelys etalloni NMS 40871 in dorsal view Anquetin & Püntener. In prep.

Conclusions New 3D cranial material of Plesiochelys etalloni Clear distinction between Plesiochelys etalloni and Plesiochelys planiceps New species referred to Portlandemys New plesiochelyid known by cranium and shell Great diversity of plesiochelyids during the Kimmeridgian

Acknowledgements Paléontologie A16: The whole team, past and present, notably the field assistants, Pierre Bigler, Renaud Roch and Régine Monnin (preparation), Bernard Migy and Olivier Noaillon (photography), Pierre Widder (scientific illustration), Loïc Bocat, Apolline Lefort, Christian Püntener, and Jean-Paul Billon-Bruyat. Funding: Federal Roads Office (95%), République et Canton du Jura (5%)

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