Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (lower maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and remarks on Wedellian Elasmosauridae

LITERATURE CITED

• Bardet, N., P. Godefroit, and J. Sciau. 1999. A new elasmosaurid plesiosaur from the Lower Jurassic of Southern France. Palaeontology 42:927–952.
   Web of Science ®Google Scholar
• Blainville, H. M. D. de. 1835. Description de quelques espèces de reptiles de la Californie, précédée de l’analyse d’un systéme générale d’Erpetologie et d’Amphibiologie. Nouvelles Annales du Muséum d’Historie Naturelle, Paris 4:233–296.
   Google Scholar
• Benson, R. B. J., and P. S. Druckenmiller. 2014. Faunal turnover of marine tetrapods during the Jurassic–Cretaceous transition. Biological Reviews 89:1–23.
   Google Scholar
• Blakey, R. 2013. Colorado Plateau Geosystems. Reconstructing the Ancient EARTH. Available at http://cpgeosystems.com/paleomaps.html. Accessed July 25, 2013.
   Google Scholar
• Brown, D. S. 1981. The English Upper Jurassic Plesiosauroidea (Reptilia) and a review of the phylogeny and classification of the Plesiosauroidea. Bulletin of the British Museum (Natural History), Geology 35:253–347.
   Google Scholar
• Cabrera, A. 1941. Un plesiosaurio nuevo de Cretácico del Chubut. Revista del Museo de la Plata 2:113–130.
   Google Scholar
• Caldwell, M. W., T. Konishi, I. Obata, and K. Muramoto. 2008. A new species of Taniwhasaurus (Mosasauridae, Tylosaurinae) from the upper Santonian–lower Campanian (Upper Cretaceous) of Hokkaido, Japan. Journal of Vertebrate Paleontology 28:339–348.
   Web of Science ®Google Scholar
• Carpenter, K. 1996. A review of short-necked plesiosaurs from the Cretaceous of the Western Interior, North America. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 201:259–287.
   Google Scholar
• Carpenter, K. 1999. Revision of North American elasmosaurids from the Cretaceous of the Western Interior. Paludicola 2:148–173.
   Google Scholar
• Chatterjee, S., and B. J. Small. 1989. New plesiosaur from the Upper Cretaceous of Antarctica. Special Publications of the Geological Society of London 47:197–215.
   Google Scholar
• Cope, E. D. 1869. Synopsis of the extinct Batrachia, Reptilia and Aves of North America. Transactions of the American Philosophical Society (new series) 14:1–252.
   Google Scholar
• Crame, J. A., J. E. Francis, D. J. Cantrill, and D. Pirrie. 2004. Maastrichtian stratigraphy of Antarctica. Cretaceous Research 25:411–423.
   Web of Science ®Google Scholar
• Crame, J. A., D. Pirrie, J. B. Riding, and M. R. A. Thomson. 1991. Campanian–Maastrichtian (Cretaceous) stratigraphy of the James Ross Island area, Antarctica. Journal of the Geological Society of London 148:1125–1140.
   Web of Science ®Google Scholar
• Cruickshank, A. R., and R. E, Fordyce. 2002. A new marine reptile (Sauropterygia) from New Zealand: further evidence for a Late Cretaceous austral radiation of cryptoclidid plesiosaurs. Palaeontology 45:5571–5575.
   Google Scholar
• Del Valle, R. A., F. Medina, and Z. Gasparini. 1977. Nota preliminar sobre el hallazgo de reptiles fósiles marinos del suborden Plesiosauria en las islas James Ross y Vega, Antártida. Contribución del Instituto Antártico Argentino 212:1–13.
   Google Scholar
• Druckenmiller, P. S., and, A. P. Russell. 2006. A new elasmosaurid plesiosaur (Reptilia: Sauropterygia) from the Lower Cretaceous Clearwater Formation, northeastern Alberta, Canada. Paludicola 5:184–199.
   Google Scholar
• Gasparini, Z., J. E. Martin, and M. Fernández. 2003. The elasmosaurid plesiosaur Aristonectes Cabrera from the Latest Cretaceous of South America and Antarctica. Journal of Vertebrate Paleontology 23:104–115.
   Web of Science ®Google Scholar
• Goloboff, P. A., J. S. Farris, and K. C. Nixon. 2008. TNT, a free program for phylogenetic analysis. Cladistics 24:774–786.
   Web of Science ®Google Scholar
• Hector, J. 1874. On the fossil Reptilia of New Zealand. Transactions and Proceedings of the New Zealand Institute 6:333–358.
   Google Scholar
• Hiller, N., and A. A. Mannering. 2005. An unusual new elasmosaurid plesiosaur (Sauropterygia) from the Upper Haumurian (Maastrichtian) of the South Island, New Zealand. Memoirs of the Queensland Museum 51:27–37.
   Google Scholar
• Hiller, N., A. A. Mannering, C. M. Jones, and A. R. Cruickshank. 2005. The nature of Mauisaurus haasti Hector, 1874 (Reptilia: Plesiosauria). Journal of Vertebrate Paleontology 25:588–601.
   Web of Science ®Google Scholar
• Kear, B. P. 2003. Cretaceous marine reptiles of Australia: a review of taxonomy and distribution. Cretaceous Research 24:277–303.
   Web of Science ®Google Scholar
• Kear, B. P. 2007. Taxonomic clarification of the Australian elasmosaurid genus Eromangasaurus, with reference to other austral elasmosaurid taxa. Journal of Vertebrate Paleontology 27:241–246.
   Web of Science ®Google Scholar
• Ketchum, H. F., and R. B. J. Benson. 2010. Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining the outcome of phylogenetic analyses. Biological Reviews 85:361–392.
   PubMed Web of Science ®Google Scholar
• Ketchum, H. F., and R. B. J. Benson. 2011. A new pliosaurid (Sauropterygia, Plesiosauria) from the Oxford Clay Formation (Middle Jurassic, Callovian) of England: evidence for a gracile, longirostrine grade of Early–Middle Jurassic pliosaurids. Special Papers in Palaeontology 86:109–129.
   Google Scholar
• Kubo, T., M. T. Mitchell, and D. M. Henderson. 2012. Albertonectes vanderveldei, a new elasmosaur (Reptilia, Sauropterygia) from the Upper Cretaceous of Alberta. Journal of Vertebrate Paleontology 32:557–572.
   Web of Science ®Google Scholar
• Lomax, D. R., and W. Wahl. 2013. A new specimen of the elasosaurid plesiosaur Zarafasaura oceanis from the Upper Cretaceous (Maastrichtian) of Morocco. Paludicola 9:97–109.
   Google Scholar
• Maddison, W. P., and D. R. Maddison. 2011. Mesquite: A Modular System for Evolutionary Analysis, version 2.75. http://mesquiteproject.org. Accessed January 4, 2012.
   Google Scholar
• Marenssi, S. A., F. M. Salani, and S. N. Santillana. 2001. Geología del cabo Lamb, Isla Vega, Península Antártica. Instituto Antártico Argentino Contribución 530:1–43.
   Google Scholar
• Martin, J. E., J. F. Sawyer, M. Reguero, and J. A. Case. 2007. Occurrence of a young elasmosaurid plesiosaur skeleton from the Late Cretaceous (Maastrichtian) of Antarctica. Online Proceedings of the 10th International Symposium on Antarctic Earth Sciences. Open Report 2007-104, Short Research Paper 066, 4 pp.
   Google Scholar
• O’Gorman, J. P. 2012. The oldest elasmosaur (Sauropterygia, Plesiosauria) from Antarctica, Santa Marta Formation (Coniacian/?Santonian–lower Campanian) and Snow Hill Island Formation (upper Campanian–lower Maastrichtian), James Ross Island. Polar Research 31:1–10.
   Web of Science ®Google Scholar
• O’Gorman, J. P., E. Olivero, and D. Cabrera. 2012. Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from Snow Hill Island Formation (upper Campanian–lower Maastrichtian), Vega Island, Antarctica. Alcheringa 36:531–541.
   Web of Science ®Google Scholar
• O’Keefe, F. R. 2001. A cladistic analysis and taxonomic revision of the Plesiosauria (Reptilia, Sauropterygia). Acta Zoologica Fennica 213:1–63.
   Google Scholar
• O’Keefe, F. R. 2002. The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia). Paleobiology 28:101–112.
   Web of Science ®Google Scholar
• O’Keefe, F. R. 2004. Preliminary description and phylogenetic position of a new plesiosaur (Reptilia: Sauropterygia) from the Toarcian of Holsmaden, Germany. Journal of Paleontology 78:973–988.
   Web of Science ®Google Scholar
• O’Keefe, F. R., and M. T. Carrano. 2005. Correlated trends in the evolution of the plesiosaur locomotor system. Paleobiology 31:656–675.
   Web of Science ®Google Scholar
• O’Keefe, F. R., and N. Hiller. 2006. Morphologic and ontogenetic patterns in elasmosaur neck length, with comments on the taxonomic utility of neck length variables. Paludicola 5:206–229.
   Google Scholar
• Olivero, E. B. 2012. Sedimentary cycles, ammonite diversity and palaeoenvironmental changes in the Upper Cretaceous Marambio Group, Antarctica. Cretaceous Research 34:348–366.
   Web of Science ®Google Scholar
• Olivero, E. B., and F. A. Medina. 2000. Patterns of Late Cretaceous ammonite biogeography in southern high latitudes: the family Kossmaticeratidae in Antarctica. Cretaceous Research 21:269–279.
   Web of Science ®Google Scholar
• Olivero, E. B., D. R. Martinioni, and F. J. Mussel. 1992. Sedimentología y bioestratigrafía del Cretácico Superior de cabo Lamb (isla Vega, Antártida). Implicancias sobre ciclos sedimentarios y evolución de la cuenca; pp. 125–145 in C. A. Rinaldi (ed.), Geología de la Isla James Ross, Taylor & Francis, Buenos Aires.
   Google Scholar
• Olivero, E. B., J. J. Ponce, and D. R. Martinioni. 2008. Sedimentology and architecture of sharp-based tidal sandstones in the upper Marambio Group, Maastrichtian of Antarctica. Sedimentary Geology 210:11–26.
   Web of Science ®Google Scholar
• Otero, R. A., S. Soto-Acuña, F. R. O’Keefe, J. P. O’Gorman, W. Stinnesbeck, M. A. Suárez, D. Rubilar-Rogers, L. A. Quinzio-Sinn, and C. Salazar. 2014. Aristonectes quiriquinensis sp. nov., a new highly derived elasmosaurid from the late Maastrichtian of central Chile. Journal of Vertebrate Paleontology 34:100–125.
   Web of Science ®Google Scholar
• Owen, R. 1860. On the orders of fossil and recent Reptilia, and their distribution in time. Reports of the British Association for the Advancement of Science 29:153–166.
   Google Scholar
• Persson, P. O. 1963. A revision of the classification of the Plesiosauria with a synopsis of the stratigraphical and geological distribution of the group. Lunds Universitets Årsskrift 59:1–57.
   Google Scholar
• Pirrie, D., J. A. Crame, and J. B. Riding. 1991. Late Cretaceous stratigraphy and sedimentology of Cape Lamb, Vega Island, Antarctica. Cretaceous Research 12:227–258.
   Web of Science ®Google Scholar
• Pirrie, D., J. A. Crame, S. A. Lomas, and J. B. Riding. 1997. Late Cretaceous stratigraphy of the Admiralty Sound region, James Ross Basin, Antarctica. Cretaceous Research 18:109–137.
   Web of Science ®Google Scholar
• Rinaldi, C. A. 1982. The Upper Cretaceous in the James Ross Island Group; pp. 331–337 in C. Craddock (ed.), Antarctic Geoscience. Taylor & Francis, Madison, Wisconsin.
   Google Scholar
• Sachs, S., B. P. Kear, and M. J. Everhart. 2013. Revised vertebral count in the “longest-necked vertebrate” Elasmosaurus platyurus Cope 1868, and clarification of the cervical-dorsal transition in plesiosauria. PLoS ONE 8:e70877. doi: 10.1371/journal.pone.0070877.
   PubMed Web of Science ®Google Scholar
• Sato, T. 2002. Description of plesiosaurs (Reptilia: Sauropterygia) from the Bearpaw Formation (Campanian–Maastrichtian) and a phylogenetic analysis of the Elasmosauridae. Ph.D. dissertation, University of Calgary, Calgary, Alberta, Canada, 391 pp.
   Google Scholar
• Sato, T. 2003. Terminonatator ponteixensis, a new elasmosaur (Reptilia; Sauropterygia) from the Upper Cretaceous of Saskatchewan. Journal of Vertebrate Paleontology 23:89–103.
   Web of Science ®Google Scholar
• Sato, T., Y. Hasegawa, and M. Manabe. 2006. A new elasmosaurid plesiosaur from the Upper Cretaceous of Fukushima, Japan. Palaeontology 49:467–484.
   Web of Science ®Google Scholar
• Sato, T., T. Konishi, R. Hirayama, and M. W. Caldwell. 2012. A review of the Upper Cretaceous marine reptiles from Japan. Cretaceous Research 37:319–340.
   Web of Science ®Google Scholar
• Thiele, K. 1993. The holy grail of the perfect character: the cladistic treatment of morphometric data. Cladistics 9:275–304.
   PubMed Web of Science ®Google Scholar
• Vincent, P., N. Bardet, X. Pereda-Suberbiola, B. Bouya, M. Amaghzaz, and M. S. Meslouh. 2011. Zarafasaura oceanis, a new elasmosaurid (Reptilia: Sauropterygia) from the Maastrichtian phosphates of Morocco and the palaeobiogeography of latest Cretaceous plesiosaurs. Gondwana Research 19:1062–1073.
   Web of Science ®Google Scholar
• Welles, S. P. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125–254.
   Google Scholar
• Welles, S. P. 1952. A review of the North American Cretaceous elasmosaurs. University of California Publications in Geological Sciences 29:47–144.
   Google Scholar
• Welles, S. P. 1962. A new species of elasmosaur from the Aptian of Colombia and a review of the Cretaceous plesiosaurs. University of California Publications in Geological Sciences 44:1–96.
   Google Scholar
• Wiffen, J., and W. L. Moisley. 1986. Late Cretaceous reptiles (Families Elasmosauridae and Pliosauridae) from the Mangahouanga Stream, North Island, New Zealand. New Zealand Journal of Geology and Geophysics 29:205–252.
   Web of Science ®Google Scholar
• Submitted September 22, 2013; revisions received April 14, 2014; accepted May 31, 2014.Handling editor: Robin O’Keefe
   Google Scholar