The completeness of the fossil record of plesiosaurs, marine reptiles from the Mesozoic

• Języki publikacji: EN

Abstrakty

EN

Plesiosaurs were a highly successful group of marine reptiles occurring worldwide in the Jurassic and Cretaceous, but to date few studies have focused on their preservation through time. Here, we conduct the first detailed assessment of the quality of the plesiosaur fossil record. Data was compiled for 178 specimens representing 114 valid species. For each species we calculated the character completeness metric (CCM: percentage of phylogenetic characters from a cladistic dataset that can be scored for that species) and the skeletal completeness metric (SCM: percentage of the overall skeleton that is preserved for that species). Average CCM and SCM values were calculated for individual geological stages. A strong significant positive correlation was recovered between CCM and SCM, suggesting that the two metrics are recording the same signal, at least for this clade. Although a significant correlation between changes in sea level and changes in plesiosaur completeness was not recovered, an underlying negative relationship may be present but obscured by poorly sampled time bins. Plesiosaur completeness though time is not significantly correlated with that for contemporary terrestrial groups (sauropods, pterosaurs, birds), but is significantly correlated with that for ichthyosaurs, suggesting common controls on skeletal preservation in the marine realm. Significantly higher median completeness values in plesiosaurs and ichthyosaurs than in contemporary terrestrial groups support the hypothesis that the marine tetrapod fossil record is more complete than that of terrestrial tetrapods. A collector’s curve for plesiosaurs shows a generally slow constant rate of discovery from the latter part of the 19th century until the 1990s, at which point the rate of discovery increased substantially and shows no sign of slowing. A significant but very weak negative correlation between SCM and the year in which a taxon was named suggests a weak tendency for more recently named species to have less complete skeletons.

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2017
• Tom: 62
• Numer: 3
• Opis fizyczny: p.563-573,fig.,ref.

Twórcy

Bibliografia

• Alroy, J. 2010. Geographical, environmental and intrinsic biotic controls on Phanerozoic marine diversification. Palaeontology 53: 1211–1235.
• Behrensmeyer, A.K., Kidwell, S.M., and Gastaldo, R.A. 2000. Taphonomy and paleobiology. Paleobiology 26: 103–147.
• Bell, M.A. and Lloyd, G.T. 2015. Strap: an R package for plotting phylogenies against stratigraphy and assessing their stratigraphic congruence. Palaeontology 58: 379–389.
• Benjamini, Y. and Hochberg, Y. 1995. Controlling the false discovery rate: a practical and powerful approach to multiple testing. Journal of the Royal Statistical Society. Series B (Methodological) 57: 289–300.
• Benson, R.B.J. and Butler, R.J. 2011. Uncovering the diversification history of marine tetrapods: ecology influences the effect of geological sampling biases. Geological Society, London, Special Publications 358: 191–208.
• Benson, R.B.J. and Druckenmiller, P.S. 2014. Faunal turnover of marine tetrapods during the Jurassic–Cretaceous transition. Biological Reviews 89: 1–23.
• Benson, R.B.J, Bates, K.T., Johnson, M.R., and Withers, P.J. 2011. Cranial anatomy of Thalassiodracon hawkinsii (Reptilia, Plesiosauria) from the Early Jurassic of Somerset, United Kingdom. Journal of Vertebrate Paleontology 31: 562–574.
• Benson, R.B.J., Butler, R.J., Lindgren, J., and Smith, A.S. 2010. Mesozoic marine tetrapod diversity: mass extinctions and temporal heterogeneity in geological megabiases affecting vertebrates. Proceedings of the Royal Society B: Biological Sciences 277: 829–834.
• Benson, R.B.J., Evans, M., and Druckenmiller, P.S. 2012. High diversity, low disparity and small body size in plesiosaurs (Reptilia, Sauropterygia) from the Triassic–Jurassic Boundary. PLoS ONE 7: e31838.
• Benson, R.B.J., Evans, M., Smith, A.S., Sassoon, J., Moore-Faye, S., Ketchum, H.F., and Forrest, R. 2013. A giant pliosaurid skull from the Late Jurassic of England. PLoS ONE 8: e65989.
• Benton, M.J., Dunhill, A.M., Lloyd, G.T., and Marx, F.G. 2011. Assessing the quality of the fossil record: insights from vertebrates. Geological Society, London, Special Publications 358: 63–94.
• Brocklehurst, N. and Fröbisch, J. 2014. Current and historical perspectives on the completeness of the fossil record of pelycosaurian-grade synapsids. Palaeogeography, Palaeoclimatology, Palaeoecology 399: 114–126.
• Brocklehurst, N., Upchurch, P., Mannion, P.D., and O’Connor, J. 2012. The completeness of the fossil record of Mesozoic birds: implications for early avian evolution. PLoS ONE 7: e39056.
• Brown, D., Vincent, P., and Bardet, N. 2013. Osteological redescription of the skull of Microcleidus homalospondylus (Sauropterygia, Plesiosauria) from the Lower Jurassic of England. Journal of Paleontology 87: 537–549.
• Butler, R.J., Benson, R.B.J., Carrano, M.T., Mannion, P.D., and Upchurch, P. 2011. Sea level, dinosaur diversity and sampling biases: investigating the ‘common cause’ hypothesis in the terrestrial realm. Proceedings of the Royal Society B: Biological Sciences 278: 1165–1170.
• Cleary, T.J., Moon, B.C., Dunhill, A.M., and Benton, M.J. 2015. The fossil record of ichthyosaurs, completeness metrics and sampling biases. Palaeontology 58: 521–536.
• Conybeare, W. 1822. IX. Additional notices on the fossil genera Ichthyosaurus and Plesiosaurus. Transactions of the Geological Society of London 2: 103–123.
• Cope, E.D. 1869. On some reptilian remains. American Journal of Science. Series 2 48: 278.
• Dean, C.D., Mannion, P.D., and Butler, R.J. 2016. Preservational bias controls the fossil record of pterosaurs. Palaeontology 59: 225–247.
• Druckenmiller, P.S. 2002. Osteology of a new plesiosaur from the Lower Cretaceous (Albian) Thermopolis Shale of Montana. Journal of Vertebrate Paleontology 22: 29–42.
• Druckenmiller, P.S. and Russell, A.P. 2008. A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922. Zootaxa 1863: 1–120.
• Großmann, F. 2007. The taxonomic and phylogenetic position of the Plesiosauroidea from the Lower Jurassic Posidonia Shale of south-west Germany. Palaeontology 50: 545–564.
• Haq, B.U., Hardenbol, J., and Vail, P.R. 1987. Chronology of fluctuating sea levels since the Triassic. Science 235: 1156–1167.
• Kear, B.P. and Barrett, P.M. 2011. Reassessment of the Lower Cretaceous (Barremian) pliosauroid Leptocleidus superstes Andrews, 1922 and other plesiosaur remains from the nonmarine Wealden succession of southern England. Zoological Journal of the Linnean Society 161: 663–691.
• Kear, B.P., Schroeder, N.I., and Lee, M.S. 2006. An archaic crested plesiosaur in opal from the Lower Cretaceous high-latitude deposits of Australia. Biology Letters 2: 615–619.
• Ketchum, H.F. and Benson, R.B.J. 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.
• Mannion, P.D. and Upchurch, P. 2010. Completeness metrics and the quality of the sauropodomorph fossil record through geological and historical time. Paleobiology 36: 283–302.
• Miller, K.G., Kominz, M.A., Browning, J.V., Wright, J.D., Mountain, G.S., Katz, M.E., Sugarman, P.J., Cramer, B.S., Christie-Blick, N., and Pekar, S.F. 2005. The Phanerozoic record of global sea-level change. Science 310: 1293–1298.
• O’Gorman, J.P., Salgado, L., Olivero, E.B., and Marenssi, S.A. 2015. 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. Journal of Vertebrate Paleontology 35: e931285.
• O’Keefe, F.R. 2001. A cladistic analysis and taxonomic revision of the Plesiosauria (Reptilia: Sauropterygia). Acta Zoologica Fennica 213: 1–63
• O’Keefe, F.R. 2002. The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia). Paleobiology 28: 101–112.
• O’Keefe, F.R. 2004. Preliminary description and phylogenetic position of a new plesiosaur (Reptilia: Sauropterygia) from the Toarcian of Holzmaden, Germany. Journal of Paleontology 78: 973–988.
• O’Keefe, F.R., Street, H., Cavigelli, J.P., Socha, J.J., and O’Keefe, R.D. 2009. A plesiosaur containing an ichthyosaur embryo as stomach contents from the Sundance Formation of the Bighorn Basin, Wyoming. Journal of Vertebrate Paleontology 29: 1306–1310.
• Otero, R.A., Soto-Acuña, S., Vargas, A.O., Rubilar-Rogers, D., Yury-Yáñez, R.E., and Gutstein, C.S. 2014. Additions to the diversity of elasmosaurid plesiosaurs from the Upper Cretaceous of Antarctica. Gondwana Research 26: 772–784.
• Smith, A.S. 2015. Reassessment of “Plesiosaurus” megacephalus (Sauropterygia: Plesiosauria) from the Triassic–Jurassic boundary, UK. Palaeontologia Electronica 18: 1–20.
• Smith, A.S. and Dyke, G.J. 2008. The skull of the giant predatory pliosaur Rhomaleosaurus cramptoni: implications for plesiosaur phylogenetics. Naturwissenschaften 95: 975–980.
• Storrs, G.W. 1984. Elasmosaurus platyurus and a page from the CopeMarsh war. Discovery 17: 25–27.
• Verrière, A., Brocklehurst, N., and Fröbisch, J. 2016. Assessing the completeness of the fossil record: comparison of different methods applied to parareptilian tetrapods (Vertebrata: Sauropsida). Paleobiology 42: 680–695.
• Vincent, P. 2011. A re-examination of Hauffiosaurus zanoni, a pliosauroid from the Toarcian (Early Jurassic) of Germany. Journal of Vertebrate Paleontology 31: 340–351.
• Vincent, P. 2012. Re-description of a basal plesiosaur (Reptilia, Sauropterygia) from the Lower Jurassic of England. Journal of Paleontology 86: 167–176.
• Vincent, P. and Benson, R.B.J. 2012. Anningasaura, a basal plesiosaurian (Reptilia, Plesiosauria) from the Lower Jurassic of Lyme Regis, United Kingdom. Journal of Vertebrate Paleontology 32: 1049–1063.
• Walther, M. and Fröbisch, J. 2013. The quality of the fossil record of anomodonts (Synapsida, Therapsida). Comptes Rendus Palevol 12: 495–504.

Identyfikatory

DOI

10.4202/app.00355.2017