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Article: The long-term history of dispersal among lizards in the early Eocene: new evidence from a microvertebrate assemblage in the Bighorn Basin of Wyoming, USA

Publication: Palaeontology
Volume: 54
Part: 6
Publication Date: November 2011
Page(s): 1243 1270
Author(s): Krister T. Smith
Addition Information

How to Cite

SMITH, K. T. 2011. The long-term history of dispersal among lizards in the early Eocene: new evidence from a microvertebrate assemblage in the Bighorn Basin of Wyoming, USA. Palaeontology54, 6, 1243–1270.

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References

  • AUGÉ, M. 1987. Confirmation de la présence d’Iguanidae (Reptilia, Lacertilia) dans l’Éocène européen. Comptes Rendus de l’Académie des Sciences, Série II: Mécanique – Physique – Chimie, Sciences de la Terre et de l’Univers, 305, 633–636.
  • AUGÉ, M. 1990. La faune de lézards et d’Amphisbenes (Reptilia, Squamata) du gisement de Dormaal (Belgique, Eocene inférieur). Bulletin de l’Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre, 60, 161–173.
  • AUGÉ, M. 2003a. La faune de Lacertilia (Reptilia, Squamata) de l’Éocène inférieur de Prémontré (Bassin de Paris, France). Geodiversitas, 25, 539–574.
  • AUGÉ, M. 2003b. Lacertilian faunal change across the Paleocene–Eocene boundary in Europe. In WING, S. L., GINGERICH, P. D., SCHMITZ, B. and THOMAS, E. (eds). Causes and consequences of globally warm climates in the Early Paleogene. The Geological Society of America, Special Paper, 369, 441–454.
  • AUGÉ, M. 2005. Évolution des lézards du Paléogène en Europe. Mémoires du Muséum National d’Histoire Naturelle, 192, 1–369.
  • AUGÉ, M. and SULLIVAN, R. M. 2006. A new genus, Paraplacosauriops (Squamata, Anguidae, Glyptosaurinae), from the Eocene of France. Journal of Vertebrate Paleontology, 26, 133–137.
  • BADGLEY, C. and GINGERICH, P. D. 1988. Sampling and faunal turnover in early Eocene mammals. Palaeogeography, Palaeoclimatology, Palaeoecology, 63, 141–157.
  • BAIRD, S. F. 1858. Description of new genera and species of North American lizards in the Museum of the Smithsonian Institution. Proceedings of the Academy of Natural Sciences of Philadelphia, 1858, 253–256.
  • BAO, H. M., KOCH, P. L. and RUMBLE, D. 1999. Paleocene–Eocene climatic variation in western North America: evidence from the δ18O of pedogenic hematite. Geological Society of America Bulletin, 111, 1405–1415.
  • BARTELS, W. S. 1983. A transitional Paleocene–Eocene reptile fauna from the Bighorn Basin, Wyoming. Herpetologica, 39, 359–374.
  • BARTELS, W. S. 1987. Fossil reptile assemblages and depositional environments of selected early Tertiary vertebrate bone concentrations, Bighorn Basin, Wyoming. Unpublished PhD Thesis. The University of Michigan, Ann Arbor, Michigan, 630 pp.
  • BEARD, K. C. 1998. East of Eden: Asia as an important center of taxonomic origination in mammalian evolution. In BEARD, K. C. and DAWSON, M. R. (eds). Dawn of the age of mammals in Asia. Bulletin of the Carnegie Museum of Natural History, 34, 5–39.
  • BEARD, K. C. 2008. The oldest North American primate and mammalian biogeography during the Paleocene–Eocene Thermal Maximum. Proceedings of the National Academy of Sciences of the United States of America, 105, 3815–3818.
  • BEARD, K. C. and DAWSON, M. R. 1999. Intercontinental dispersal of Holarctic land mammals near the Paleocene/Eocene boundary: paleogeographic, paleoclimatic and biostratigraphic implications. Bulletin de la Société Géologique de France, 170, 697–706.
  • BELL, T. 1825. On a new genus of Iguanidae. The Zoological Journal, 2, 204–207.
  • BHULLAR, B.-A. S. and SMITH, K. T. 2008. Helodermatid lizard from the Miocene of Florida, the evolution of the dentary in Helodermatidae, and comments on dentary morphology in Varanoidea. Journal of Herpetology, 42, 286–302.
  • BLANC, C.-P. 1977. Reptiles Sauriens Iguanidae. Faune de Madagascar, 45, 1–195.
  • BOWN, T. M., ROSE, K. D., SIMONS, E. L. and WING, S. L. 1994. Distribution and stratigraphic correlation of upper Paleocene and lower Eocene fossil mammal and plant localities of the Fort Union, Willwood, and Tatman Formations, southern Bighorn Basin, Wyoming. U.S. Geological Survey Professional Paper, 1540, 1–103.
  • BROWN, R. W. 1956. Composition of scientific words, Revised edn. Smithsonian Institution Press, Washington, DC, 882 pp.
  • CHEW, A. 2009. Paleoecology of the early Eocene Willwood mammal fauna from the central Bighorn Basin, Wyoming. Paleobiology, 35, 13–31.
  • CLYDE, W. C. 2001. Mammalian biostratigraphy of the McCullough Peaks area in the northern Bighorn Basin. University of Michigan Papers on Paleontology, 33, 109–126.
  • CLYDE, W. C., SHELDON, N. D., KOCH, P. L., GUNNELL, G. F. and BARTELS, W. S. 2001. Linking the Wasatchian/Bridgerian boundary to the Cenozoic global climate optimum: new magnetostratigraphic and isotopic results from South Pass, Wyoming. Palaeogeography, Palaeoclimatology, Palaeoecology, 167, 175–199.
  • CLYDE, W. C., FINARELLI, J. A. and CHRISTENSEN, K. E. 2005. Evaluating the relationship between pedofacies and faunal composition: implications for faunal turnover at the Paleocene–Eocene boundary. Palaios, 20, 390–399.
  • CLYDE, W. C., HAMZI, W., FINARELLI, J. A., WING, S. L., SCHANKLER, D. and CHEW, A. 2007. Basin-wide magnetostratigraphic framework for the Bighorn Basin, Wyoming. Geological Society of America Bulletin, 119, 848–859.
  • CONRAD, J. L., RIEPPEL, O. and GRANDE, L. 2007. Green River (Eocene) polychrotid (Squamata: Reptilia) and a re-examination of iguanian systematics. Journal of Paleontology, 81, 1365–1373.
  • COPE, E. D. 1866. Fifth contribution to the herpetology of Tropical America. Proceedings of the Academy of Natural Sciences of Philadelphia, 1866, 317–323.
  • DEVENDER, VAN T. R. and ESHELMAN, R. E. 1979. Referral of the fossil lizard Sceloporus holmani (late Pliocene of north-central Kansas) to the genus Phrynosoma. Herpetologica, 35, 380–382.
  • DOUGLASS, E. 1903. New vertebrates from the Montana Tertiary. Annals of the Carnegie Museum, 2, 145–199.
  • ESTES, R. 1964. Fossil vertebrates from the Late Cretaceous Lance Formation, eastern Wyoming. University of California Publications in Geological Sciences, 49, 1–187.
  • ESTES, R. 1983. Sauria terrestria, Amphisbaenia (Handbuch der Paloherpetologie, v. 10A). Gustav Fischer Verlag, Stuttgart, 249 pp.
  • ESTES, R. and HUTCHISON, J. H. 1980. Eocene lower vertebrates from Ellesmere Island, Canadian Arctic archipelago. Palaeogeography, Palaeoclimatology, Palaeoecology, 30, 325–347.
  • ESTES, R. and PRICE, L. I. 1973. Iguanid lizard from the Upper Cretaceous of Brazil. Science, 180, 748–751.
  • ETHERIDGE, R. 1959. The relationships of the anoles (Reptilia: Sauria: Iguanidae), an interpretation based on skeletal morphology. Unpublished PhD Thesis, University of Michigan, Ann Arbor, Michigan, 236 pp.
  • ETHERIDGE, R. and De QUEIROZ, K. 1988. A phylogeny of Iguanidae. 283–367. In ESTES, R. and PREGILL, G. K. (eds). Phylogenetic relationships of the Lizard families. Stanford University Press, Stanford, 648 pp.
  • FARLEY, K. A. and ELTGROTH, S. F. 2003. An alternative age model for the Paleocene–Eocene thermal maximum using extraterrestrial 3He. Earth and Planetary Science Letters, 208, 135–148.
  • FOLIE, A., SIGÉ, B. and SMITH, T. 2005. A new scincomorph lizard from the Palaeocene of Belgium and the origin of Scincoidea in Europe. Naturwissenschaften, 92, 542–546.
  • FRICKE, H. C. 2003. Investigation of early Eocene water-vapor transport and paleoelevation using oxygen isotope data from geographically widespread mammal remains. Geological Society of America Bulletin, 115, 1088–1096.
  • FRICKE, H. C. and WING, S. L. 2004. Oxygen isotope and paleobotanical estimates of temperature and δ18O-latitude gradients over North America during the early Eocene. American Journal of Science, 304, 612–635.
  • FROST, D. R. and ETHERIDGE, R. 1989. A phylogenetic analysis and taxonomy of iguanian lizards (Reptilia: Squamata). Miscellaneous Publications, University of Kansas Museum of Natural History, 81, 1–65.
  • FROST, D. R. ETHERIDGE, R., Janies, D. and Titus, T. A. 2001. Total evidence, sequence alignment, evolution of polychrotid lizards, and a reclassification of the Iguania (Squamata: Iguania). American Museum Novitates, 3343, 1–38.
  • GAO, K. and HOU, L. H. 1995. Iguanians from the Upper Cretaceous Djadochta Formation, Gobi Desert, China. Journal of Vertebrate Paleontology, 15, 57–78.
  • GAO, K. and NORELL, M. A. 2000. Taxonomic composition and systematics of Late Cretaceous lizard assemblages from Ukhaa Tolgod and adjacent localities, Mongolian Gobi Desert. Bulletin of the American Museum of Natural History, 249, 1–118.
  • GAUTHIER, J. A. 1982. Fossil xenosaurid and anguid lizards from the early Eocene Wasatch Formation, southeast Wyoming, and a revision of the Anguioidea. Contributions to Geology, University of Wyoming, 21, 7–54.
  • GILMORE, C. W. 1928. Fossil lizards of North America. Memoirs of the National Academy of Sciences, 22, 1–201.
  • GILMORE, C. W. 1942. Paleocene faunas of the Polecat Bench Formation, Park County, Wyoming. Part II. Lizards. Proceedings of the American Philosophical Society, 85, 159–167.
  • GINGERICH, P. D. 1980. History of early Cenozoic vertebrate paleontology in the Bighorn Basin. University of Michigan Papers on Paleontology, 24, 1–6.
  • GINGERICH, P. D. 1989. New earliest Wasatchian mammalian fauna from the Eocene of northwestern Wyoming: composition and diversity in a rarely sampled high-floodplain assemblage. University of Michigan Papers on Paleontology, 28, 1–97.
  • GINGERICH, P. D. 2003. Mammalian responses to climate change at the Paleocene–Eocene boundary: Polecat Bench record in the northern Bighorn Basin, Wyoming. Geological Society of America Special Paper, 369, 463–478.
  • GINGERICH, P. D. 2006. Environment and evolution through the Paleocene–Eocene thermal maximum. Trends in Ecology and Evolution, 21, 246–253.
  • GINGERICH, P. D. and CLYDE, W. C. 2001. Overview of mammalian biostratigraphy in the Paleocene–Eocene Fort Union and Willwood Formations of the Bighorn and Clarks Fork Basins. University of Michigan Papers on Paleontology, 33, 1–14.
  • GRAY, J. E. 1825. A synopsis of the genera of Reptiles and Amphibia, with a description of some new species. Annals of Philosophy (Series 2), 10, 193–217.
  • GRAY, J. E. 1827. A synopsis of the genera of saurian reptiles, in which some new genera are indicated and others reviewed by actual examination. The Philosophical Magazine, or Annals of Chemistry, Mathematics, Astronomy, Natural History, and General Science, 2, 54–58.
  • GREENWOOD, D. R. and WING, S. L. 1995. Eocene continental climates and latitudinal temperature gradients. Geology, 23, 1044–1048.
  • HARRINGTON, G. J. 2003. Geographic patterns in the floral response to Paleocene–Eocene warming. In WING, S. L., GINGERICH, P. D., SCHMITZ, B. and THOMAS, E. (eds). Causes and consequences of globally warm climates in the Early Paleogene. The Geological Society of Americam Special Paper, 369, 381–383.
  • HECHT, M. K. 1956. A new xantusiid lizard from the Eocene of Wyoming. American Museum Novitates, 1774, 1–8.
  • HILLS, R. C. 1889. Additional notes on the Huerfano Beds. Proceedings of the Colorado Scientific Society, 3, 217–223.
  • HOFFSTETTER, R. 1943. Varanidae et Necrosauridae fossiles. Bulletin du Muséum Nationale d’Histoire Naturelle, Série 2, 15, 134–141.
  • HOFFSTETTER, R. 1957. Un Saurien hélodermatidé (Eurheloderma gallicum nov. gen. et sp.) dans la faune fossile des phosphorites du Quercy. Bulletin de la Société Géologique de France, Série 6, 7, 775–786.
  • HOLMAN, J. A. 1972. Herpetofauna of the Calf Creek local fauna (lower Oligocene: Cypress Hills Formation) of Saskatchewan. Canadian Journal of Earth Sciences, 9, 1612–1631.
  • HOLROYD, P. A., HUTCHISON, J. H. and STRAIT, S. G. 2001. Turtle diversity and abundance through the lower Eocene Willwood Formation of the southern Bighorn Basin. University of Michigan Papers on Paleontology, 33, 97–107.
  • HOTTON, N. 1955. A survey of adaptive relationships of dentition to diet in the North American Iguanidae. American Midland Naturalist, 53, 89–114.
  • HOU, L. H. 1974. Paleocene lizards from Anhui, China [in Chinese, with English summary]. Vertebrata PalAsiatica, 12, 193–202.
  • HOU, L. H. 1976. New materials of Palaeocene lizards of Anhui. Vertebrata PalAsiatica, 14, 45–52.
  • HUTCHISON, J. H. 1980. Turtle stratigraphy of the Willwood Formation, Wyoming: preliminary results. University of Michigan Papers on Paleontology, 24, 115–118.
  • HUTCHISON, J. H. 1998. Turtles across the Paleocene/Eocene Epoch boundary in west-central North America. 401–408. In AUBRY, M.-P., LUCAS, S. G. and BERGGREN, W. A. (eds). Late Paleocene–early Eocene climatic and biotic events in the marine and terrestrial records. Columbia University Press, New York, 508 pp.
  • KRAUS, M. J. and BOWN, T. M. 1986. Paleosols and time resolution in alluvial stratigraphy. 180–207. In WRIGHT, V. P. (ed.). Paleosols: their recognition and interpretation. Princeton University Press, Princeton, New Jersey, 340 pp.
  • KRAUS, M. J. and BOWN, T. M. 1993. Short-term sediment accumulation rates determined from Eocene alluvial paleosols. Geology, 21, 743–746.
  • KUHN, O. 1944. Weitere Lacertilier, insbesondere Iguanidae aus dem Eozn des Geiseltales. Palaeontologische Zeitschrift, 23, 360–366.
  • LEIDY, J. 1870. Proceedings of the Academy of Natural Sciences of Philadelphia, 1870, 123–124.
  • MARSH, O. C. 1871. Notice of some new fossil reptiles from the Cretaceous and Tertiary formations. American Journal of Science (Series 3), 1, 447–459.
  • MARSH, O. C. 1872. Preliminary description of new Tertiary reptiles. American Journal of Science (Series 3), 4, 298–309.
  • McGREW, P. O., BERMAN, J. E., HECHT, M. K., HUMMEL, J. M., SIMPSON, G. G. and WOOD, A. E. 1959. The geology and paleontology of the Elk Mountain and Tabernacle Butte area, Wyoming. Bulletin of the American Museum of Natural History, 117, 121–176.
  • MESZOELY, C. A. M. 1970. North American fossil anguid lizards. Bulletin of the Museum of Comparative Zoology, 139, 87–150.
  • MONTANUCCI, R. R. 1968. Comparative dentition in four iguanid lizards. Herpetologica, 24, 305–315.
  • MONTERO, R. and GANS, C. 1999. The head skeleton of Amphisbaena alba Linneaus [sic]. Annals of Carnegie Museum, 68, 15–80.
  • NAEEM, S., KNOPS, J. M. H., TILMAN, D., HOWE, K. M., KENNEDY, T. and GALE, S. 2000. Plant diversity increases resistance to invasion in the absence of covarying extrinsic factors. Oikos, 91, 97–108.
  • OPPEL, M. 1811. Die ordnungen, familien, und gattungen der reptilien als prodrom einer naturgeschichte derselben. Joseph Lindauer, Munich, 86 pp.
  • POE, S. 2004. Phylogeny of anoles. Herpetological Monographs, 18, 37–89.
  • RAY, C. E. 1965. Variation in the number of marginal tooth positions in three species of iguanid lizards. Breviora, Museum of Comparative Zoology, 236, 1–15.
  • ROBINSON, P. 1966. Fossil Mammalia of the Huerfano Formation, Eocene, of Colorado. Peabody Museum of Natural History Bulletin, 21, 1–95.
  • RÖHL, U., BRALOWER, T. J., NORRIS, R. D. and WEFER, G. 2000. New chronology for the late Paleocene thermal maximum and its environmental implications. Geology, 28, 927–930.
  • ROSSMANN, T. 2000. Osteologische Beschreibung von Geiseltaliellus longicaudus Kuhn, 1944 (Squamata: Iguanoidea) aus dem Mittleren Eozn der Fossillagersttten Geiseltal und Grube Messel (Deutschland), mit einer Revision der Gattung Geiseltaliellus. Palaeontographica A, 258, 117–158.
  • SCHANKLER, D. M. 1980. Faunal zonation of the Willwood Formation in the central Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology, 24, 99–114.
  • SCHATZINGER, R. A. 1975. Later Eocene (Uintan) lizards from the greater San Diego area, California. Unpublished MSc Thesis, San Diego State University, San Diego, California, 212 pp.
  • SCHATZINGER, R. A. 1980. New species of Palaeoxantusia (Reptilia: Sauria) from the Uintan (Eocene) of San Diego Co., California. Journal of Paleontology, 54, 460–471.
  • SCHULTE, J. A. II, VALLADARES, J. P. and LARSON, A. 2003. Phylogenetic relationships within Iguanidae inferred using molecular and morphological data and a phylogenetic taxonomy of iguanian lizards. Herpetologica, 59, 399–419.
  • SILCOX, M. T. and ROSE, K. D. 2001. Unusual vertebrate microfaunas from the Willwood Formation, early Eocene of the Bighorn Basin, Wyoming. 131–164. In GUNNELL, G. F. (ed.). Eocene biodiversity: unusual occurrences and rarely sampled habitats. Kluwer Academic/Plenum Publishers, New York, 432 pp.
  • SLOAN, R. E. 1970. Cretaceous and Paleocene terrestrial communities of western North America. 427–453. In YOCHELSON, E. L. (ed.). Proceedings of the North American paleontological convention, Vol. 1. Allen Press, Lawrence, Kansas, 703 pp.
  • SMITH, K. T. 2006a. A diverse new assemblage of late Eocene squamates (Reptilia) from the Chadron Formation of North Dakota, U.S.A. Palaeontologia Electronica, 9, 5A, 44 pp.
  • SMITH, K. T. 2006b. Horizontal and vertical aspects of species diversity in the fossil record: alpha, beta, and the temporal nature of the richness-temperature relation. Unpublished PhD Thesis, Yale University, New Haven, Connecticut, 587 pp.
  • SMITH, K. T. 2009a. A new lizard assemblage from the earliest Eocene (zone Wa0) of the Bighorn Basin, Wyoming, U.S.A.: biogeography during the warmest interval of the Cenozoic. Journal of Systematic Palaeontology, 7, 299–358.
  • SMITH, K. T. 2009b. Eocene lizards of the clade Geiseltaliellus from Messel and Geiseltal, Germany, and the early radiation of Iguanidae (Reptilia: Squamata). Bulletin of the Peabody Museum of Natural History, 50, 219–306.
  • SMITH, K. T. 2011. The evolution of mid-latitude faunas during the Eocene: late Eocene lizards of the Medicine Pole Hills reconsidered. Bulletin of the Peabody Museum of Natural History, 52, 3–105.
  • SMITH, T., ROSE, K. D. and GINGERICH, P. D. 2006. Rapid Asia–Europe–North America geographic dispersal of earliest Eocene primate Teilhardina during the Paleocene–Eocene Thermal Maximum. Proceedings of the National Academy of Sciences of the United States of America, 103, 11223–11227.
  • STACHOWICZ, J. J., FRIED, H., OSMAN, R. W. and WHITLATCH, R. B. 2002. Biodiversity, invasion resistance, and marine ecosystem function: reconciling pattern and process. Ecology, 83, 2575–2590.
  • STRAIT, S. G. 2001. New Wa-0 mammalian fauna from Castle Gardens in the southeastern Bighorn Basin. University of Michigan Papers on Paleontology, 33, 127–143.
  • SULLIVAN, R. M. 1979. Revision of the Paleogene genus Glyptosaurus (Reptilia, Anguidae). Bulletin of the American Museum of Natural History, 163, 1–72.
  • SULLIVAN, R. M. 1982. Fossil lizards from Swain Quarry “Fort Union Formation,” middle Paleocene (Torrejonian), Carbon County, Wyoming. Journal of Paleontology, 56, 996–1010.
  • SULLIVAN, R. M. 1986a. Glyptosaurus? obtusidens is a Nomen Dubium. Journal of Herpetology, 20, 96–97.
  • SULLIVAN, R. M. 1986b. A new fossil anguid lizard Parodaxosaurus sanjuanensis, new genus, new species from the middle Paleocene (Torrejonian) Nacimiento Formation, San Juan Basin, New Mexico. Journal of Herpetology, 20, 109–111.
  • SULLIVAN, R. M. 1986c. The skull of Glyptosaurus sylvestris Marsh, 1871 (Lacertilia: Anguidae). Journal of Vertebrate Paleontology, 6, 28–37.
  • SULLIVAN, R. M. 1989. Proglyptosaurus huerfanensis, new genus, new species: Glyptosaurine lizard (Squamata: Anguidae) from the early Eocene of Colorado. American Museum Novitates, 2949, 1–8.
  • SULLIVAN, R. M. and LUCAS, S. G. 1988. Fossil Squamata from the San José Formation, early Eocene, San Juan Basin, New Mexico. Journal of Paleontology, 62, 631–639.
  • SULLIVAN, R. M. and LUCAS, S. G. 1996. Palaeoscincosaurus middletoni, new genus and species (Squamata: ?Scincidae) from the early Paleocene (Puercan) Denver Formation, Colorado. Journal of Vertebrate Paleontology, 16, 666–672.
  • VICARIO, S., CACCONE, A. and GAUTHIER, J. 2003. Xantusiid ‘night’ lizards: a puzzling phylogenetic problem revisited using likelihood-based Bayesian methods on mtDNA sequences. Molecular Phylogenetics and Evolution, 26, 243–261.
  • WHITE, T. E. 1952. Preliminary analysis of the vertebrate fossil fauna of the Boysen reservoir area. Proceedings of the United States National Museum, 102, 185–207.
  • WILF, P. 2000. Late Paleocene–Early Eocene climate changes in southwestern Wyoming: paleobotanical analysis. Geological Society of America Bulletin, 112, 292–307.
  • WING, S. L. and HARRINGTON, G. J. 2001. Floral response to rapid warming in the earliest Eocene and implications for concurrent faunal change. Paleobiology, 27, 539–563.
  • WING, S. L., BAO, H. M. and KOCH, P. L. 2000. An early Eocene cool period? Evidence for continental cooling during the warmest part of the Cenozoic. 197–237. In HUBER, B. T., MACLEOD, K. G. and WING, S. L. (eds). Warm climates in earth history. Cambridge University Press, Cambridge, UK, 480 pp.
  • WING, S. L., HARRINGTON, G. J., SMITH, F. A., BLOCH, J. I., BOYER, D. M. and FREEMAN, K. H. 2005. Transient floral change and rapid global warming at the Paleocene–Eocene boundary. Science, 310, 993–996.
  • YANS, J., STRAIT, S. G., SMITH, T., DUPUIS, C., STEURBAUT, E. and GINGERICH, P. D. 2006. High-resolution carbon isotope stratigraphy and mammalian faunal change at the Paleocene–Eocene boundary in the Honeycombs area of the southern Bighorn Basin, Wyoming. American Journal of Science, 306, 712–735.
  • ZACHOS, J., PAGANI, M., SLOAN, L., THOMAS, E. and BILLUPS, K. 2001. Trends, rhythms, and aberrations in global climate 65 Ma to present. Science, 292, 686–693.
  • ZACHOS, J., DICKENS, G. R. and ZEEBE, R. E. 2008. An early Cenozoic perspective on greenhouse warming and carbon-cycle dynamics. Nature, 451, 279–283.
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