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New cranial fossils of the Jurassic turtle Neusticemys neuquina and phylogenetic relationships of the only thalassochelydian known from the eastern Pacific

  • P. González Ruiz (a1) (a2) (a3), M. S. de la Fuente (a1) (a2) (a3) and M.S. Fernández (a1) (a4)


Neusticemys neuquina (Fernández and de la Fuente, 1988) is a turtle from the Upper Jurassic of the Neuquén Basin, Patagonia, Argentina. Here we describe in detail a new skull, lower jaw, and a vertebra, utilizing both traditional anatomical description and computed tomography (CT). New diagnostic cranial characters of Neusticemys neuquina are: a round depression on the ventral surface of the basisphenoid, a relatively larger oval foramen nervi trigemini, and reduced and steepened triturating surfaces on both the maxilla and dentary. The new morphological information presented in this study was included in a phylogenetic analysis, the primary result of which was recovery of Neusticemys neuquina within Thalassochelydia. Characters recognized as synapomorphies of this clade include: (1) anterolateral recess of the anterior surface of the quadrate positioned lateral to the processus trochlearis oticum, (2) presence of a fossa on the supraoccipital-opisthotic-exoccipital contact area, (3) foramina anterius caroticus cerebralis located close together but independently perforating the basisphenoid, and (4) the presence of the splenial in the mandible. Two contrasting dispersal scenarios could explain how this species of Thalassochelydia can be found outside of Europe. The presence of Neusticemys neuquina in the Neuquén Basin could be the consequence of an early dispersion event, for which we lack intermediate forms, or it could be the result of a later event once the clade was already established in Europe.



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Aguirre-Urreta, B., Naipauer, M., Lescano, M., López-Martínez, R., Pujana, I., Vennari, V., De Lena, L.F., Concheyro, A., and Ramos, V.A., 2019, The Tithonian chrono-biostratigraphy of the Neuquén Basin and related Andean areas: A review and update: Journal of South American Earth Sciences, v. 92, p. 350367.
Anquetin, J., Barrett, P.M., Jones, M.E.H., Moore-Fay, S., and Evans, S.E., 2008, A new stem turtle from the Middle Jurassic of Scotland: New insights into the evolution and palaeoecology of basal turtles: Proceedings of the Royal Society B, Biological Sciences, v. 276, p. 879886, doi:10.1098/rspb.2008.1429.
Anquetin, J., Püntener, C., and Billon-Bruyat, J.-P., 2015, Portlandemys gracilis n. sp., a new coastal marine turtle from the Late Jurassic of Porrentruy (Switzerland) and a reconsideration of plesiochelyid cranial anatomy: PLoS ONE, v. 10, no. 6, p. e0129193, doi:10.1371/journal.pone.0129193.
Anquetin, J., Püntener, C., and Joyce, W.G., 2017, A review of the fossil record of turtles of the clade Thalassochelydia: Bulletin of the Peabody Museum of Natural History, v. 58, p. 317369, doi:10.3374/014.058.0205.
Baur, G., 1887, Über den Ursprung der Extremitäten der Ichthyopterygia: Berichte über de Versammlungen des Oberrheinischen Vereines, v. 20, p. 1720.
Billon-Bruyat, J.-P., Lécuyer, C., Martineau, F., and Mazin, J.-M., 2005, Oxygen isotope compositions of Late Jurassic vertebrate remains from lithographic limestones of western Europe: Implications for the ecology of fish, turtles and crocodilians: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 216, p. 359375, doi:10.1016/j.palaeo.2004.11.011.
Bonnaterre, P.-J., 1789, Encyclopédie Méthodique Ou Par Ordre de Matières: Tableau Encyclopédique et Méthodique des Trois Règnes de la Nature: Cetologie, Erpétologie, Ophiologie: Erpétologie: Paris, Panckoucke, 70 p.
Cadena, E., 2015, The first South American sandownid turtle from the Lower Cretaceous of Colombia: PeerJ, v. 3, p. e1431, doi:10.7717/perj.1431.
Cadena, E.A., and Gaffney, E.S., 2005, Notoemys zapatocaensis, a new side-necked turtle (Pleurodira: Platychelyidae) from the Early Cretaceous of Colombia: American Museum Novitates, no. 3470, p. 119, doi:10.1206/0003-0082(2005)470<0001:NZANST>2.0.CO;2.
Cadena, E.A., and Joyce, W., 2015, A review of the fossil record of stem-pleurodiran turtles: Bulletin of the Peabody Museum of Natural History, v. 56, no. 1, p. 320.
Cadena, E.A., and Parham, J.F., 2015, Oldest known marine turtle? A new protostegid from the Lower Cretaceous of Colombia: PaleoBios, v. 32, p. 142.
Cattoi, N., and Freiberg, M., 1961, Nuevo hallazgo de Chelonia extinguidos en la República Argentina: Physis, v. 22, p. 202.
Cope, E.D., 1871, Letter to Professor Leslev giving an account of a journey in the valley of the Smoky Hill River in Kansas: Proceedings of the American Philosophical Society, v. 12, p. 174176.
Cope, E.D., 1873, Toxochelys latiremis: Proceedings of the Academy of Natural Sciences of Philadelphia, v. 25, p. 10.
Cope, E.D., 1877, On reptilian remains from the Dakota beds of Colorado: Proceedings of the American Philosophical Society, v. 17, p. 193196.
Daudin, F.M., 1802, Histoire Naturelle, Générale et Particulière des Reptiles: Ouvrage Faisant suit à l'Histoire Naturelle Genérélle et Particulière, Compossée par Leclerc de Buffon, et Rédigee par C.S. Sonnini, Member de Plusierurs Sociétés Savants, Volume 2: Paris, F. Dufart, 432 pp.
de la Fuente, M.S., 2007, Testudines, in Gasparini, Z., Coria, R., and Salgado, L., eds., Patagonian Mesozoic Reptiles: Bloomington, Indiana University Press, p. 5086.
de la Fuente, M.S., and Fernández, M.S., 1989, Notoemys laticentralis Cattoi & Freiberg, 1961 from the Upper Jurassic of Argentina: A member of the infraorder Pleurodira (Cope, 1868): Stvdia Geológica Salmanticensia, Stvdia Palaeocheloniologica, v. 3, p. 2532.
de la Fuente, M.S., and Fernández, M.S., 2011, An unusual pattern of limb morphology in the Tithonian marine turtle Neusticemys neuquina from the Vaca Muerta Formation, Neuquén Basin, Argentina: Lethaia, v. 44, p. 1525, doi:10.1111/j.1502-3931.2010.00217.x.
de la Fuente, M., and Iturralde-Vinent, M., 2001, A new pleurodiran turtle from the Jagua Formation (Oxfordian) of western Cuba: Journal of Paleontology, v. 75, p. 860869, doi:10.1017/S0022336000016954.
de la Fuente, M.S., Sterli, J., and Fernández, M.S., 2014, New remains and preliminary pylogenetic relationships of Neuticemys neuquina (Testudinata) from the Upper Jurassic of Neuquen Basin (Argentina): International Palaeontological Congress, 4th, September-October 2014, Mendoza, Abstracts Volume, p. 511.
De Lena, F., Otavio, L., López-Martínez, R., Lescano, M., Aguire-Urreta, B., Concheyro, A., Vennari, V., Naipauer, M., Samankassou, E., Pimentel, M., Ramos, V.A., and Schaltegger, U., 2019, High-precision U-Pb ages in the Early Tithonian to early Berriasian and implications for the numerical age of the Jurassic-Cretaceous boundary: Solid Earth, v. 10, p. 114, doi:10.5194/se-10-1-2019.
Digregorio, R.E., Gulisano, C.A., Gutiérrez Pleimling, A.R., and Minitti, S.A., 1984, Esquema de la evolución geodinámica de la Cuenca Neuquina y sus implicancias paleogeográficas, in Congreso Geológico Argentino, 9th, San Carlos de Bariloche, Actas, Volume 2: Buenos Aires, Asociación Geológica Argentina, p. 147162.
Evers, S.W., and Benson, R.B.J., 2019, A new phylogenetic hypothesis of turtles with implications for the timing and number of evolutionary transitions to marine lifestyles in the group: Palaeontology, v. 62, p. 93134, doi:10.1111/pala.12384.
Evers, S.W., Barret, P.M., and Benson, R.B.J., 2019, Anatomy of Rhinochelys pulchriceps (Protostegidae) and marine adaptation during the early evolution of chelonioids: PeerJ, v. 7: p. e6811, doi:10.7717/peerj.6811.
Fedorov, A., Beichel, R., Kalpathy-Cramer, J., Finet, J., Fillion-Robin, J.-C., Pujol, S., Bauer, C., Jennings, D., Fennessy, F.M., Sonka, M., Buatti, J., Aylward, S.R., Miller, J.V., Pieper, S., and Kikinis, R., 2012, 3D Slicer as an image computing platform for the Quantitative Imaging Network: Magnetic Resonance Imaging, v. 30, p. 13231341, doi:10.1016/j.mri.2012.05.001.
Fernández, M.F., and de la Fuente, M.S., 1988, Una nueva tortuga (Cryptodira: Thalassemydidae) de la Formación Vaca Muerta (Jurásico: Titoniano) de la provincia del Neuquén, Argentina: Ameghiniana, v. 25, p. 129138.
Fernández, M.S., and de la Fuente, M.S., 1993, Las tortugas casiquélidias de las calizas litográficas titonianas del área Los Catutos Argentina: Ameghiniana, v. 30, p. 283295.
Fernández, M.S., and de la Fuente, M.S., 1994, Redescription and phylogenetic position of Notoemys the oldest gondwanian pleurodiran turtle: Neues Jahrbuch für Geologie und Paläontologie Abhandlungen, v. 193, p. 81103.
Fernández, M.S., Herrera, Y., Vennari, V.V., Campos, L., de la Fuente, M., Talevi, M., and Aguirre Urreta, B., 2019, Marine reptiles from the Jurassic/Cretaceous transition at the High Andes, Mendoza, Argentina: Journal of South American Earth Sciences, v. 92, p. 658673, doi:10.1016/j.jsames.2019.03.013.
Gaffney, E.S., 1975a, A taxonomic revision of the Jurassic turtles Portlandemys and Plesiochelys: American Museum Novitates, no. 2574, p. 119.
Gaffney, E.S., 1975b, Solnhofia parsonsi, a new cryptodiran turtle from the Late Jurassic of Europe: American Museum Novitates, no. 2576, p. 122.
Gaffney, E.S., 1976, Cranial morphology of the European Jurassic turtles Portlandemys and Plesiochelys: Bulletin of the American Museum of Natural History, v. 157, p. 487544.
Gaffney, E.S., and Kitching, J.W., 1994, The most ancient African turtle: Nature, v. 369, p. 55.
Gaffney, E.S., Hutchison, J.H., Jenkins, F.A., and Meeker, L.J., 1987, Modern turtle origins: The oldest known cryptodire: Science, v. 237, p. 289291.
Gaffney, E.S., Rich, T.H., Vickers-Rich, P., Constantine, A., Vacca, R., and Kool, L., 2007, Chubutemys, a new eucryptodiran turtle from the Early Cretaceous of Argentina, and the relationships of the Meiolaniidae: American Museum Novitates, no. 3599, p. 135, doi:10.1206/0003-0082(2007)3599[1:CANETF]2.0.CO;2.
Gasparini, Z., and Fernández, M., 2005, Jurassic marine reptiles in the Neuquen Basin, in Veiga, G.D., Spalletti, L.A., Howell, J.E., and Schwarz, E., eds., The Neuquen Basin, Argentina: A Case Study in Sequence Stratigraphy and Basin Dynamics: Geological Society of London, Special Publications, v. 252, p. 279294.
Gasparini, Z., Spalletti, L., and de la Fuente, M.S., 1997, Marine reptiles of a Tithonian transgression, western Neuquén Basin, Argentina: Facies and paleoenvironments: Geobios, v. 30, p. 701712.
Gasparini, Z., Spalletti, L., Fernández, M., and de la Fuente, M., 1999, Tithonian marine reptiles from the Neuquén Basin: Diversity and paleonvironments: Revue de Paléobiologie, v.18, p. 335345.
Gasparini, Z., Fernández, M.S., de la Fuente, M.S., Herrera, Y., Codorniú, L., and Garrido, A., 2015, Reptiles from lithographic limestones of the Los Catutos Member (Middle-Upper Tithonian), Neuquén Province, Argentina: An essay on its taxonomic composition and preservation in an environmental and geographic context: Ameghiniana, v. 52, p. 128, doi:10.5710/AMGH.14.08.2014.2738.
Goloboff, P., and Catalano, S., 2016, TNT versión 1.5, including a full implementation of phylogenetic morphometrics: Cladistics, v. 32, p. 221238, doi:10.1111/cla.12160.
Gray, J.E., 1830, A synopsis of the species of the class Reptilia, in Griffith, E., and Pidgeon, E., The class Reptilia arranged by the Baron Cuvier, with specific descriptions, in Griffith, E., ed., The Animal Kingdom Arranged in Conformity with its Organization, by the Baron Cuvier, with Additional Descriptions of all the Species Hitherto Named, and of Many Not Before Noticed, Volume 9, Reptilia, Supplement: London, Whittaker, Treacher, and Company, p. 121.
Gray, J.E., 1831, A specimen of a tortoise regarded as the type of a new genus in the family Emydidae: Proceedings of the Zoological Society of London, v. 1, p. 106107.
Gray, J.E., 1847, Description of a new genus of Emydae: Proceedings of the Zoological Society of London, v. 15, p. 5556.
Havlik, P.E., Joyce, W.G., and Böhme, M., 2014, Allaeochelys libyca, a new carettochelyine turtle from the middle Miocene (Langhian) of Libya: Bulletin of the Peabody Museum of Natural History, v. 55, p. 201215, doi:10.3374/014.055.0207.
Hay, O.P., 1904, On some fossil turtles belonging to the Marsh collection in Yale University Museum: American Journal of Science, no. 106, p. 261276.
Hirayama, R., 1994, Phylogenetic systematics of chelonioid sea turtles: The lsland Arch, v. 3, p. 270284.
Hirayama, R., 1997, Distribution and diversity of Cretaceous chelonioids, in Calloway, J.M., and Nicholls, E.L., eds., Ancient Marine Reptiles: San Diego, California, Academic Press, p. 225241.
Hirayama, R., 1998, Oldest known sea turtle: Nature, v. 392, p. 705708.
Joyce, W.G., 2000, The first complete skeleton of Solnhofia parsonsi (Cryptodira, Eurysternidae) from the Upper Jurassic of Germany and its taxonomic implications: Journal of Paleontology, v. 74, p. 684700, doi:10.1017/S0022336000032807.
Joyce, W.G., Parham, J.F., and Gauthier, J.A., 2004, Developing a protocol for the conversion of rank-based taxon names to phylogenetically defined clade names, as exemplified by turtles: Journal of Paleontology, v. 78, p. 9891013, doi:10.1666/0022-3360(2004)078<0989:DAPFTC>2.0.CO;2.
Karl, H.-V., Tichy, G., and Valdiserri, D., 2012, Sontiochelys cretacea Stache, 1905 and new description of the families Eurysternidae Dollo, 1886 and Thalassemydidae Rütimeyer, 1873 (Testudines: Cryptodira): Studia Geologica Salmanticensia, v. 48, p. 4576.
Kear, B.P., and Lee, M.S.Y., 2006, A primitive protostegid from Australia and early sea turtle evolution: Biology Letters, v. 2, p. 116119, doi:10.1098/rsbl.2005.0406.
Kikinis, R., Pieper, S.D., and Vosburgh, K., 2014, 3D Slicer: A platform for subject-specific image analysis, visualization, and clinical support, in Jolesz, F.A., ed., Intraoperative Imaging Image-Guided Therapy, Volume 3, no. 19, p. 277289.
Klein, I.T., 1760, Klassification und Kurze Geschichte der Vierfüßigen Thiere (translation by Behn, F.D.): Lübeck, Germany, Jonas Schmidt, 381 p.
Klein, N., Schoch, R.R., and Schweigert, G., 2016, A juvenile eurysternid turtle (Testudines: Eurysternidae) from the upper Kimmeridgian (Upper Jurassic) of Nusplingen (SW Germany): Geobios, v. 49, p. 355364, doi:10.1016/j.geobios.2016.06.008.
Lapparent de Broin, F. de, 2001, The European turtle fauna from the Triassic to the present: Dumerilia, v. 4, p. 155216.
Lapparent de Broin, F. de, de la Fuente, M.S., and Ferrnández, M.S., 2007, Notoemys (Chelonii, Pleurodira), Late Jurassic of Argentina: New examination of the anatomical structures and comparisons: Revue de Paléobiologie, v. 26, p. 99136.
Leanza, H.A., 1973, Estudio sobre los cambios faciales de los estratos limítrofes Jurásico-Cretácicos entre Loncopué y Picún Leufú, provincia del Neuquén, República Argentina: Revista de la Asociación Geológica Argentina, v. 28, p. 97132.
Leanza, H.A., 1980, The Lower and Middle Tithonian ammonite fauna from Cerro Lotena, province of Neuquén, Argentina: Zitteliana, v. 5, p. 149.
Leanza, H.A., and Hugo, C.A., 1997, Hoja geológica 3969-III Picún Leufu: Provincias de Río Negro y Neuquén: Boletin Servicio Geológico Minero Argentino, v. 218, p. 9135.
Legarreta, L., and Gulisano, C.A., 1989, Análisis estratigráfico de la cuenca Neuquina (Triásico Superior-Terciario inferior), in Congreso Geológico Argentino, 10th, Simposio de Cuencas Sedimentarias, Tucumán: Buenos Aires, Asociación Geológica Argentina, p. 221244.
Legarreta, L., and Uliana, M.A., 1991, Jurassic-Cretaceous marine oscillations and geometry of backarc basin fill: Central Argentine Andes, in McDonald, D.I.M., ed., Sea Level Changes at Active Plate Margins: International Association of Sedimentology, Special Publications, v. 12, p. 429450.
Leidy, J., 1870, Remarks on Poicilopleuron valens, Clidastes intermedius, Leiodon proriger, Baptemys wyomingensis, and Emys stevensonianus: Proceedings of the Academy of Natural Sciences of Philadelphia, v. 22, p. 35.
LeSueur, C.A., 1827, Note sur deux espèces de tortues, du genre Trionyx de M. Geoffroy-Saint-Hilaire: Mémoires du Muséum d'Histoire Naturelle de Paris, v. 15, p. 257268.
Li, C., Wu, X.C., Rieppel, O., Wang, L.T., and Zhao, L.J., 2008, An ancestral turtle from the Late Triassic of southwestern China: Nature, v. 456, p. 497501, doi:10.1038/nature07533.
Linnaeus, C., 1758, Systema Naturae per Regna Tria Naturae (tenth edition), Volume 1, Regnum Animale: Stockholm, Laurentii Salvii, 824 p.
Lipka, T.R., Therrien, F., Weishampel, D.B., Jamniczky, H.A., Joyce, W.G., Colbert, M.W., and Brinkman, D.B., 2006, A new turtle from the Arundel Clay facies (Potomac Formation, Early Cretaceous) of Maryland, USA: Journal of Vertebrate Paleontology, v. 26, p. 300307, doi:10.1671/0272-4634(2006)26[300:ANTFTA]2.0.CO;2.
López-Conde, O.A., Sterli, J., Alvarado-Ortega, J., and Chavarría-Arellano, M.L., 2017, A new platychelyid turtle (pan-Pleurodira) from the Late Jurassic (Kimmeridgian) of Oaxaca, Mexico: Papers in Palaeontology, v. 3, p. 161174, doi:10.1002/spp2.1069.
Macellari, C.E., 1988, Cretaceous paleogeography and depositional cicles of western South America: Journal of South American Earth Sciences, v. 1, p. 373418.
Mateus, O., Jacobs, L., Polcyn, M., Schulp, A.S., Vineyard, D., Buta Neto, A., and Telles Antunes, M., 2009, The oldest African eucryptodiran turtle from the Cretaceous of Angola: Acta Palaeontologica Polonica, v. 54, p. 581588, doi:10.4202/app.208.0063.
Meyer, H. von, 1839, Eurysternum Wagleri, Münster: Eine schildkröte aus dem kalkschiefer von Solnhofen: Beiträge zur Petrefacten-Kunde, v. 1, p. 7582.
Meylan, P.A., Moody, R.T.J., Walker, C.A., and Chapman, S.D., 2000, Sandownia harrisi, a highly derived trionychoid turtle (Testudines: Cryptodira) from the Early Cretaceous of the Isle of Wight, England: Journal of Vertebrate Paleontology, v. 20, p. 522532, doi:10.1671/0272-4634(2000)020[0522:SHAHDT].
Nessov, L.A., and Krasovskaya, T.B., 1984, Changes in the composition of turtle assemblages of Late Cretaceous of Middle Asia: Vestnik Leningradskogo Gosudarstvennogo Universiteta, v. 3, p. 1525. [in Russian]
Nopcsa, F., 1923, On the geological importance of the primitive reptilian fauna in the uppermost Cretaceous of Hungary, with a description of a new tortoise (Kallokibotion): Quarterly Journal of the Geological Society, v. 79, p. 100116.
Owen, R., 1842, Report on British fossil reptiles: Part 2: Report of the British Association for the Advancement of Science, 11th, Plymouth, July 1841: London, Murray, v. 11, p. 60204.
Owen, R., 1886, Description of fossil remains of two species of a megalanian genus (Meiolania) from ‘Lord Howe's Island’: Philosophical Transactions of the Royal Society of London, v. 177, p. 471480.
Parsons, T.S., and Williams, E.E., 1961, Two Jurassic turtle skulls: A morphological study: Bulletin of the Museum of Comparative Zoology, v. 125, p. 43107.
Pereira, A.G., Sterli, J., Moreira, F.R., and Schrago, C.G., 2017, Multilocus phylogeny and statistical biogeography clarify the evolutionary history of major lineages of turtles: Molecular Phylogenetics and Evolution, v. 113, p. 5966, doi:10.1016/j.ympev.2017.05.008.
Pérez-Garcia, A., 2015, New data on the poorly-known Late Jurassic European turtles Thalassemys and Enaliochelys and description of a new basal eucryptodiran taxon: Journal of Iberian Geology, v. 41, p. 2130, doi:10.5209/rev_JIGE.2015.v41.n1.48652.
Pictet, F.-J., and Campiche, G., 1858–1860, Description des fossiles du terrain Crétacé des environs de Sainte-Croix: Première partie: Matériaux Pour la Paléontologie Suisse, v. 2, p. 1380.
Pictet, F.-J., and Humbert, A., 1857, Description d'une emyde nouvelle (Emys etalloni) du terrain Jurassique supérieur des environs de Saint-Claude: Matériaux Pour la Paléontologie Suisse, v. 1, p. 110.
Püntener, C., Billon-Bruyat, J.-P., Bocat, L., Berger, J.-P., and Joyce, W.G., 2014, Taxonomy and phylogeny of the turtle Tropidemys langii Rütimeyer, 1873, based on new specimens from the Kimmeridgian of the Swiss Jura Mountains: Journal of Vertebrate Paleontology, v. 34, p. 353374, doi:10.1080/02724634.2013.804412.
Püntener, C., Anquetin, J., and Billon-Brullat, J.-P., 2017, The comparative osteology of Plesiochelys bigleri n. sp., a new coastal marine turtle from the Late Jurassic of Porrentruy (Switzerland): PeerJ, v. 5, p. e3482, doi:10.7717/peerj.3482.
Rabi, M., Zhou, C.-F., Wings, O., Ge, S., and Joyce, W.G., 2013, A new xinjiangchelyid turtle from the Middle Jurassic of Xinjiang, China and the evolution of the basipterygoid process in Mesozoic turtles: BMC Evolutionary Biology, v. 13, p. 203, doi:10.1186/1471-2148-13-203.
Ramsay, E.P., 1887, On a new genus and species of fresh water tortoise from the Fly River, New Guinea: Proceedings of the Linnaean Society of New South Wales, v. 1, p. 158162.
Raselli, I., 2018, Comparative cranial morphology of the Late Cretaceous protostegid sea turtle Desmatochelys lowii: PeerJ, v. 6, p. e5964, doi:10.7717/peerj.5964.
Raselli, I., and Anquetin, J., 2019, Novel insights into the morphology of Plesiochelys bigleri from the early Kimmeridgian of northwestern Switzerland: PLoS ONE, v. 14, no. 5, p. e0214629, doi:10.1371/journal.pone.0214629.
Riccardi, A.C., 2015, Remarks on the Tithonian-Berriasian ammonite biostratigraphy of west central Argentina: Volumina Jurassica, v. 13, p. 2352.
Rieppel, O., 1980, The skull of the Upper Jurassic cryptodire turtle Thalassemys, with a reconsideration of the chelonian braincase: Palaeontographica Abteilung A (Palaozoologie-Stratigraphie), v. 171, p. 105140.
Rütimeyer, L., 1873, Die fossilen schildkröten von Solothurn und der übrigen Juraformation: Neue Denkschriften der allgemeinen Schweizerischen Gesellschaft für die gesamten: Naturwissenschaften, v. 25, p. 1185.
Schneider, J.G., 1783, Allgemeine Naturgeschichte der Schildkröten, nebst einem Systematischen Verseichnisse der einzelnen Arten und zwey Kupfern: Leipzig, Germany,, Johann Gotfried Müllersche Buchhandlung, 364 p.
Spalletti, L., Franzese, J., Matheos, S., and Schwarz, E., 2000, Sequence stratigraphy of a tidally dominated carbonate-siliciclastic ramp: The Tithonian-early Berriasian of the southern Neuquén Basin, Argentina: Journal of the Geological Society, London, v. 157, p. 433446, doi:10.1144/jgs.157.2.433.
Sukhanov, V.B., 2000, Mesozoic turtles of middle and Central Asia, in Benton, M.J., Shishkin, M.A., Unwin, D.M., and Kurochkin, E.N., eds., The Age of Dinosaurs in Russia and Mongolia: Cambridge, UK, Cambridge University Press, p. 309367.
Sukhanov, V.B., and Narmandakh, P., 2006, New taxa of Mesozoic turtles from Mongolia: Fossil Turtle Research, v. 1, p. 119127.
Tong, H., and Meylan, P., 2013, Morphology and relationships of Brachyopsemys tingitana gen. et sp. nov. from the early Paleocene of Morocco and recognition of the new eucryptodiran turtle family: Sandownidae, in Brinkman, D.B., Holroyd, P.A., and Gardner, J.D., eds., Morphology and Evolution of Turtles: New York, Springer, p. 187212. doi:10.1007/978-007-4309-0_13.
Troost, G., 1835, Chelonura Temminckii, in Harlan, R., Genera of North American Reptilia, and a synopsis of the species, in Harlan, R., Medical and Physical Researches, or Original Memoirs in Medicine, Surgery, Physiology, Geology, Zoology, and Comparative Anatomy: Philadelphia, Bailey, p. 157158.
Vandelli, D., 1761, Epistola de Holothurio, et Testudine Coriacea ad Celeberrinum Carolum Linnaeum: Padua, Conzetti, p. 112.
Vennari, V.V., 2016, Tithonian ammonoids (Cephalopoda, Ammonoidea) from the Vaca Muerta Formation, Neuquén Basin, west-central Argentina: Palaeontographica Abteilung A, v. 305, p. 85165.
Weaver, C., 1931, Paleontology of the Jurassic and Cretaceous of west central Argentina: Memoirs of the University of Washington, v. 1, p. 1469.
Whetstone, K.N., 1978, A New Genus of Cryptodiran Turtles (Testudinoidea, Chelydridae) from the Upper Cretaceous Hell Creek Formation of Montana: University of Kansas Science Bulletin, v. 51, p. 540563.
Wiegmann, A.F.A., 1835, Beiträge zur Zoologie, gesammelt auf einer Reise um die Erde, von Dr. F.J.F. Meyen: Amphibien: Nova Acta Academia, v. 17, p. 185268.
Wieland, G.R., 1896, Archelon ischyros: A new gigantic cryptodiran testudinate from the Fort Pierre Cretaceous of South Dakota: American Journal of Science, v. 4, p. 399415.
Young, C.-C., and Chow, M.-C., 1953, New fossil reptiles from Szechuan China: Scientia Sinica, v. 2, p. 216.
Yrigoyen, M.R., 1991, Hydrocarbon resources of Argentina: International Petrolium Congress, 13th, Buenos Aires, Volume 1: Petrotecnia, Special Issue, p. 3854.
Zangerl, R., 1953, The vertebrate fauna of the Selma Formation of Alabama: Part 3 and Part 4: The turtles of the family Protostegidae and family Toxochelyidae: Fieldiana Geology Memoirs, v. 3, p. 59277.
Zangerl, R., 1980, Patterns of phylogenetic differentiation in the toxochelyid and cheloniid sea turtles: American Zoologist, v. 20, p. 585596.
Zhu, L., Ivan Kolesov, I., Gao, Y., Kikinis, R., and Tannenbaum, A., 2014, An effective interactive medical image segmentation method using Fast GrowCut, (accessed September 2019).

New cranial fossils of the Jurassic turtle Neusticemys neuquina and phylogenetic relationships of the only thalassochelydian known from the eastern Pacific

  • P. González Ruiz (a1) (a2) (a3), M. S. de la Fuente (a1) (a2) (a3) and M.S. Fernández (a1) (a4)


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