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  • Adams JM, Green WA, Zhang Y. 2008. Leaf margins and temperature in the North American flora: recalibrating the paleoclimatic thermometer. Global and Planetary Change 60: 523534.
  • Aizen MA, Ezcurra C. 2008. Do leaf margins of the temperate forest flora of Southern South America reflect a warmer past? Global Ecology and Biogeography 17: 164174.
  • Bailey IW, Sinnott EW. 1915. A botanical index of Cretaceous and Tertiary climates. Science 41: 831834.
  • Bailey IW, Sinnott EW. 1916. The climatic distribution of certain types of angiosperm leaves. American Journal of Botany 3: 2439.
  • Baker-Brosh KF, Peet RK. 1997. The ecological significance of lobed and toothed leaves in temperate forest trees. Ecology 78: 12501255.
  • Berry EW. 1925. A Miocene flora from Patagonia: Johns Hopkins University Studies in Geology 6: 183251.
  • Berry EW. 1937. A Paleocene flora from Patagonia: Johns Hopkins University Studies. Geology 12: 3350.
  • Billings FH. 1905. Precursory leaf serrations of Ulmus. Botanical Gazette 40: 224225.
  • Burnham RJ, Pitman NCA, Johnson KR, Wilf P. 2001. Habitat-related error in estimating temperatures from leaf margins in a humid tropical forest. Johns Hopkins University Studies in Geology 88: 10961102.
  • Cadena EA, Bloch JI, Jaramillo CA. 2010. New Podocnemidid turtle (Testudines: Pleurodira) from the Middle-Upper Paleocene of South America. Journal of Vertebrate Paleontology 30: 367382.
  • Cariglino B. 2007. Paleoclimatic analysis of three Eocene lacustrine floras (Laguna del Hunco, Chubut, Argentina; Republic, Washington, USA; and Green River, Utah, USA) using digital leaf physiognomy. MS thesis, Pennsylvania State University, University Park, PA, USA.
  • Carpenter SJ, Erickson JM, Holland FD Jr. 2003. Migration of a Late Cretaceous fish. Nature 423: 7074.
  • Currano ED, Labandeira CC, Wilf P. 2010. Fossil insect folivory tracks paleotemperature for six million years. Ecological Monographs 80: 547567.
  • Currano ED, Wilf P, Wing SL, Labandeira CC, Lovelock EC, Royer DL. 2008. Sharply increased insect herbivory during the Paleocene–Eocene Thermal Maximum. Proceedings of the National Academy of Sciences, USA 105: 19601964.
  • Dilcher D. 1973. A paleoclimatic interpretation of the Eocene floras of southeastern North America. In: Graham A, ed. Vegetation and vegetational history of northern Latin America. Amsterdam: Elsevier, 3959.
  • Dilcher DL, Kowalski EA, Wiemann MC, Hinojosa LF, Lott TA. 2009. A climatic and taxonomic comparison between leaf litter and standing vegetation from a Florida swamp woodland. American Journal of Botany 96: 11081115.
  • Dolph GE, Dilcher D. 1980a. Variation in leaf size with respect to climate in Costa Rica. Biotropica 12: 9199.
  • Dolph GE, Dilcher D. 1980b. Variation in leaf size with respect to climate in the tropics of the Western Hemisphere. Bulletin of the Torrey Botanical Club 107: 154162.
  • Doria G, Jaramillo CA, Herrera F. 2008. Menispermaceae from the Cerrejón Formation, Middle to Late Paleocene, Colombia. American Journal of Botany 95: 954973.
  • Feild TS, Sage TL, Czerniak C, Iles WJD. 2005. Hydathodal leaf teeth of Chloranthus japonicus (Chloranthaceae) prevent guttation-induced flooding of the mesophyll. Plant, Cell & Environment 28: 11791190.
  • Felsenstein J. 1985. Phylogenies and the comparative method. American Naturalist 125: 115.
  • Fricke HC, Wing SL. 2004. Oxygen isotope and paleobotanical estimates of temperature and δ18O-latitude gradients over North America during the Early Eocene. American Journal of Science 304: 612635.
  • Garland T, Harvey PH, Ives AR. 1992. Procedures for the analysis of comparative data using phylogenetically independent contrasts. Systematic Biology 41: 1832.
  • Gates DM. 1980. Biophysical ecology. New York: Springer-Verlag.
  • Givnish TJ. 1979. On the adaptive significance of leaf form. In: Solbrig T, Jain S, Johnson GB, Raven PH, eds. Topics in plant population biology. New York, NY, USA: Columbia University Press, 375407.
  • Givnish TJ. 1984. Leaf and canopy adaptations in tropical forests. In: Medina E, Mooney HA, Vasquez-Yanes C, eds. Physiological ecology of plants of the wet tropics. The Hague, the Netherlands: Dr. W. Junk Publishers, 5184.
  • Givnish TJ. 1987. Comparative studies of leaf form: assessing the relative roles of selective pressures and phylogenetic constraints. New Phytologist 106: 131160.
  • Gómez-Navarro C, Jaramillo C, Herrera F, Wing SL, Callejas R. 2009. Palms (Arecaceae) from a Paleocene rainforest of Northern Colombia. American Journal of Botany 96: 13001312.
  • Green WA. 2006. Loosening the CLAMP: an exploratory graphical approach to the Climate Leaf Analysis Multivariate Program. Palaeontologia Electronica 9: 9A.
  • Greenwood DR. 1992. Taphonomic constraints on foliar physiognomic interpretations of Late Cretaceous and Tertiary paleoclimates. Review of Palaeobotany and Palynology 71: 149190.
  • Greenwood DR. 2005. Leaf margin analysis: taphonomic constraints. Palaios 20: 498505.
  • Greenwood DR, Archibald SB, Mathewes RW, Moss PT. 2005. Fossil biotas from the Okanagan Highlands, southern British Columbia and northeastern Washington State: climates and ecosystems across an Eocene landscape. Canadian Journal of Earth Sciences 42: 167185.
  • Greenwood DR, Basinger JF. 1994. The paleoecology of high latitude Eocene swamp forests from Axel Heiberg Island, Canadian High Arctic. Review of Palaeobotany and Palynology, 81: 8397.
  • Greenwood DR, Basinger JF, Smith RY. 2010. How wet was the Arctic Eocene rain forest? Estimates of precipitation from Paleogene Arctic macrofloras. Geology 38: 1518.
  • Greenwood DR, Wilf P, Wing SL, Christophel DC. 2004. Paleotemperature estimation using leaf-margin analysis: is Australia different? Palaios 19: 129142.
  • Greenwood DR, Wing SL. 1995. Eocene continental climates and latitudinal temperature gradients. Geology 23: 10441048.
  • Gregory-Wodzicki KM. 2000. Relationship between leaf morphology and climate, Bolivia: implications for estimating paleoclimate from fossil floras. Paleobiology 26: 668688.
  • Hall JB, Swaine MD. 1981. Distribution and ecology of vascular plants in a tropical rain forest: forest vegetation in Ghana. The Hague, Netherlands: Dr. W. Junk Publishers.
  • Head JJ, Bloch JI, Hastings AK, Bourque JR, Cadena EA, Herrera FA, Polly PD, Jaramillo CA. 2009. Giant boid snake from the Palaeocene neotropics reveals hotter past equatorial temperatures. Nature 457: 715717.
  • Herrera FA, Jaramillo CA, Dilcher DL, Wing SL, Gómez-Navarro C. 2008. Fossil Araceae from a Paleocene neotropical rainforest in Colombia. American Journal of Botany 95: 15691583.
  • Hijmans RJ, Cameron SE, Parra JL, Jones PG, Jarvis A. 2005. Very high resolution interpolated climate surfaces for global land areas. International Journal of Climatology 25: 19651978.
  • Hinojosa LF, Armesto JJ, Villagran C. 2006. Are Chilean coastal forests Pre-Pleistocene relicts? Evidence from foliar physiognomy, palaeoclimate, and phytogeography. Journal of Biogeography 33: 331341.
  • Hinojosa LF, Pérez F, Gaxiola A, Sandoval I. 2010. Historical and phylogenetic constraints on the incidence of entire leaf margins: insights from a new South American model. Global Ecology and Biogeography, doi: 10.1111/j.1466-8238.2010.00595.x.
  • Huff PM, Wilf P, Azumah EJ. 2003. Digital future for paleoclimate estimation from fossil leaves? Preliminary results. Palaios 18: 266274.
  • Iglesias A, Wilf P, Johnson KR, Zamuner AB, Cúneo NR, Matheos SD, Singer BS. 2007. A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs. Geology 35: 947950.
  • Jacobs BF. 1999. Estimation of rainfall variables from leaf characters in tropical Africa. Palaeogeography, Palaeoclimatology, Palaeoecology 145: 231250.
  • Jacobs BF. 2002. Estimation of low-latitude paleoclimates using fossil angiosperm leaves: examples from the Miocene Tugen Hills, Kenya. Paleobiology 28: 399421.
  • Jacobs BF, Deino AL. 1996. Test of climate–leaf physiognomy regression models, their application to two Miocene floras from Kenya, and 40Ar/39Ar dating of the Late Miocene Kapturo site. Palaeogeography, Palaeoclimatology, Palaeoecology 123: 259271.
  • Johnson CM, Zarin DJ, Johnson AH. 2000. Post-disturbance aboveground biomass accumulation in global secondary forests. Ecology 81: 13951401.
  • Jordan GJ. 1997. Uncertainty in palaeoclimatic reconstructions based on leaf physiognomy. Australian Journal of Botany 45: 527547.
  • Kennedy EM. 1998. Cretaceous and Tertiary megafloras from New Zealand and their climate signals. PhD Thesis, Open University, Milton Keynes, UK.
  • Kennedy EM, Spicer RA, Rees PM. 2002. Quantitative palaeoclimate estimates from the Late Cretaceous and Paleocene leaf floras in the northwest of the South Island, New Zealand. Palaeogeography, Palaeoclimatology, Palaeoecology 184: 321345.
  • Koch PL, Clyde WC, Hepple RP, Fogel ML, Wing SL, Zachos JC. 2003. Carbon and oxygen isotope records from paleosols spanning the Paleocene–-Eocene boundary, Bighorn Basin, Wyoming. In: Wing SL, Gingerich PD, Schmitz B, Thomas E, eds. Causes and consequences of globally warm climates in the early Paleogene: Boulder, Colorado, Geological Society of America Special Paper 369: 4964.
  • Kowalski EA. 2002. Mean annual temperature estimation based on leaf morphology: a test from tropical South America. Palaeogeography, Palaeoclimatology, Palaeoecology 188: 141165.
  • Kowalski EA, Dilcher DL. 2003. Warmer paleotemperatures for terrestrial ecosystems. Proceedings of the National Academy of Sciences, USA 100: 167170.
  • Kraus MJ, Riggins S. 2007. Transient drying during the Paleocene–Eocene Thermal Maximum (PETM): analysis of paleosols in the Bighorn Basin, Wyoming. Palaeogeography, Palaeoclimatology, Palaeoecology 245: 444461.
  • Kvacek Z. 2007. Do extant nearest relatives of thermophile European Cenozoic plant elements reliably reflect climatic signal? Palaeogeography, Palaeoclimatology, Palaeoecology 253: 3240.
  • Larcher W, Winter A. 1981. Frost susceptibility of palms: experimental data and their interpretations. Principes 25: 143152.
  • Lewis MC. 1972. The physiological significance of variation in leaf structure. Science Progress (Oxford) 60: 2551.
  • Liang M-M, Bruch A, Collinson M, Mosbrugger V, Li C-S, Sun Q-G, Hilton J. 2003. Testing the climatic estimates from different palaeobotanical methods: an example from the Middle Miocene Shanwang flora of China. Palaeogeography, Palaeoclimatology, Palaeoecology 198: 279301.
  • Little SA, Kembel SW, Wilf P, 2010. Paleotemperature proxies from leaf fossils reinterpreted in light of evolutionary history. PLoS ONE 5(12): e15161. doi:10.1371/journal.pone.0015161.
  • MacGinitie HD. 1969. The Eocene Green River Flora of northwestern Colorado and northeastern Utah. University of California Publications in Geological Science 83: 1202.
  • Markwick PJ. 1998. Fossil Crocodilians as indicators of Late Cretaceous and Cenozoic climates: implications for using palaeontological data in reconstructing palaeoclimate. Palaeogeography, Palaeoclimatology, Palaeoecology 137: 205271.
  • Midgley JJ, Van Wyk GR, Everard DA. 1995. Leaf attributes of South African forest species. African Journal of Ecology 33: 160168.
  • Miller IM, Brandon MT, Hickey LJ. 2006. Using leaf margin analysis to estimate Mid-Cretaceous (Albian) paleolatitude of the Baja BC block. Earth and Planetary Science Letters 245: 95114.
  • Mosbrugger V, Utescher T, Dilcher DL. 2005. Cenozoic continental climatic evolution of Central Europe. Proceedings of the National Academy of Sciences, USA 102: 1496414969.
  • Parkhurst DF, Loucks OL. 1972. Optimal leaf size in relation to environment. Journal of Ecology 60: 505537.
  • Peppe DJ. 2003. Fox Hills I, a new Upper Maastrichtian megafloral zone within the Williston Basin of North Dakota. BS thesis, St Lawrence University, Canton, NY, USA.
  • Peppe DJ. 2009. A high resolution chronostratigraphic study of the early Paleocene floral record in the northern Great Plains. PhD thesis, Yale University, New Haven, CT, USA.
  • Peppe DJ. 2010. Megafloral change in the early and middle Paleocene in the Williston Basin, North Dakota, USA. Palaeogeography, Palaeoclimatology, Palaeoecology 298: 224234.
  • Peppe DJ, Erickson JM, Hickey LJ. 2007. Fossil leaf species from the Fox Hills Formation (Upper Cretaceous: Maastrichtian: North Dakota, USA) and their paleogeographic significance. Journal of Paleontology 81: 550567.
  • Peppe DJ, Royer DL, Wilf P, Kowalski EA. 2010. Quantification of large uncertainties in fossil leaf paleoaltimetry. Tectonics 29: TC3015, doi:10.1029/2009TC002549.
  • Radtke MG, Pigg KB, Wehr WC. 2005. Fossil Corylopsis and Fothergilla leaves (Hamamelidaceae) from the Lower Eocene Flora of Republic, Washington, U.S.A., and their evolutionary and biogeographic significance. International Journal of Plant Sciences 166: 347356.
  • Richards PW. 1996. The tropical rain forest, 2nd edn. Cambridge, UK: Cambridge University Press.
  • Royer DL, Kooyman RM, Little SA, Wilf P. 2009a. Ecology of leaf teeth: a multi-site analysis from an Australian subtropical rainforest. American Journal of Botany 96: 738750.
  • Royer DL, McElwain JC, Adams JM, Wilf P. 2008. Sensitivity of leaf size and shape to climate within Acer rubrum and Quercus kelloggii. New Phytologist 179: 808817.
  • Royer DL, Meyerson LA, Robertson KM, Adams JM. 2009b. Phenotypic plasticity of leaf shape along a temperature gradient in Acer rubrum. PLoS ONE 4: e7653.
  • Royer DL, Miller IM, Peppe DJ, Hickey LJ. 2010. Leaf economic traits from fossils support a weedy habit for early angiosperms. American Journal of Botany 97: 438445.
  • Royer DL, Sack L, Wilf P, Lusk CH, Jordan GJ, Niinemets Ü, Wright IJ, Westoby M, Cariglino B, Coley PD et al. 2007. Fossil leaf economics quantified: calibration, Eocene case study, and implications. Paleobiology 33: 574589.
  • Royer DL, Wilf P. 2006. Why do toothed leaves correlate with cold climates? Gas exchange at leaf margins provides new insights into a classic paleotemperature proxy. International Journal of Plant Sciences 167: 1118.
  • Royer DL, Wilf P, Janesko DA, Kowalski EA, Dilcher DL. 2005. Correlations of climate and plant ecology to leaf size and shape: potential proxies for the fossil record. American Journal of Botany 92: 11411151.
  • Sakai A, Larcher W. 1987. Frost survival of plants. Berlin, Germany: Springer-Verlag.
  • Secord R, Gingerich PD, Lohmann KC, MacLeod KG. 2010. Continental warming preceding the Palaeocene–Eocene Thermal Maximum. Nature 467: 955958.
  • Smith JJ, Hasiotis ST, Kraus MJ, Woody DT. 2009a. Transient dwarfism of soil fauna during the Paleocene-Eocene Thermal Maximum. Proceedings of the National Academy of Sciences, USA 106: 1765517660.
  • Smith ME, Carroll AR, Singer BS. 2008. Synoptic reconstruction of a major ancient lake system: Eocene Green River Formation, western United States. Geological Society of America Bulletin 120: 5484.
  • Smith RY, Basinger JF, Greenwood DR. 2009b. Depositional setting, floristics and paleoenvironment of the Early Eocene Falkland Site, a new fossil flora locality from the Okanagan Highlands, British Columbia. Canadian Journal of Earth Sciences 46: 811822.
  • Sokal RR, Rohlf FJ. 1995. Biometry, 3rd edn. New York, NY, USA: Freeman.
  • Spicer RA. 2009. CLAMP, Climate Leaf Analysis Multivariate Program. The Open University. URL http://www.open.ac.uk/earth-research/spicer/CLAMP/Clampset1.html and http://clamp.ibcas.ac.cn/ [last accessed 1 November 2010].
  • Steart DC, Spicer RA, Bamford MK. 2010. Is Southern Africa different? An investigation of the relationship between leaf physiognomy and climate in Southern African mesic vegetation. Review of Palaeobotany and Palynology 162: 607620.
  • Stevens PF. 2001 onwards. Angiosperm Phylogeny Website. Version 9. URL http://www.mobot.org/MOBOT/research/APweb/ [last accessed 1 November 2010].
  • Stranks L, England P. 1997. The use of a resemblance function in the measurement of climatic parameters from the physiognomy of woody dicotyledons. Palaeogeography, Palaeoclimatology, Palaeoecology 131: 1528.
  • Su T, Xing YW, Liu YS, Jacques FMB, Chen WY, Huang YJ, Zhou ZK. 2010. Leaf margin analysis: a new equation from humid to mesic forests in China. Palaios 25: 234238.
  • The Angiosperm Phylogeny Group. 2009. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnaean Society 161: 105121.
  • Torsvik TH, Müller RD, Van der Voo R, Steinberger B, Gaina C. 2008. Global plate motion frames: toward a unified model. Reviews of Geophysics 46: RG3004, doi:10.1029/2007RG000227.
  • Traiser C, Klotz S, Uhl D, Mosbrugger V. 2005. Environmental signals from leaves – a physiognomic analysis of European vegetation. New Phytologist 166: 465484.
  • Uhl D, Mosbrugger V, Bruch A, Utescher T. 2003. Reconstructing palaeotemperatures using leaf floras – case studies for a comparison of Leaf Margin Analysis and the Coexistence Approach. Review of Palaeobotany and Palynology 126: 4964.
  • Utescher T, Mosbrugger V, Ashraf AR. 2000. Terrestrial climate evolution in northwest Germany over the last 25 million years. Palaios 15: 430449.
  • Vogel S. 1968. Sun leaves and shade leaves: differences in convective heat dissipation. Ecology 49: 12031204.
  • Vogel S. 1970. Convective cooling at low airspeeds and the shapes of broad leaves. Journal of Experimental Botany 21: 91101.
  • Vogel S. 2009. Leaves in the lowest and highest winds: temperature, force and shape. New Phytologist 183: 1326.
  • Warton DI, Wright IJ, Falster DS, Westoby M. 2006. Bivariate line-fitting methods for allometry. Biological Reviews of the Cambridge Philosophical Society 81: 259291.
  • Webb LJ. 1968. Environmental relationships of the structural types of Australian rain forest vegetation. Ecology 49: 296311.
  • Westoby M, Cunningham SL, Fonseca CR, Overton J, Wright IJ. 1998. Phylogeny and variation in light capture area deployed per unit investment in leaves: designs for selecting study species with a view to generalising. In: Lambers H, Van Vuuren PHMMI, eds. Inherent variation in plant growth: physiological mechanisms and ecological consequences. Leiden, the Netherlands: Backhuys Publishers, 539566.
  • Whittaker RH. 1975. Communities and ecosystems. New York, NY, USA: Macmillan.
  • Wiemann MC, Manchester SR, Dilcher DL, Hinojosa LF, Wheeler EA. 1998. Estimation of temperature and precipitation from morphological characters of dicotyledonous leaves. American Journal of Botany 85: 17961802.
  • Wilf P. 1997. When are leaves good thermometers? A new case for leaf margin analysis. Paleobiology 23: 373390.
  • Wilf P, Cúneo NR, Johnson KR, Hicks JF, Wing SL, Obradovich JD. 2003a. High plant diversity in Eocene South America: evidence from Patagonia. Science 300: 122125.
  • Wilf P, Johnson KR, Cúneo NR, Smith ME, Singer BS, Gandolfo MA. 2005a. Eocene plant diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina. American Naturalist 165: 634650.
  • Wilf P, Johnson KR, Huber BT. 2003b. Correlated terrestrial and marine evidence for global climate changes before mass extinction at the Cretaceous–Paleogene boundary. Proceedings of the National Academy of Sciences, USA 100: 599604.
  • Wilf P, Labandeira CC, Johnson KR, Coley PD, Cutter AD. 2001. Insect herbivory, plant defense, and early Cenozoic climate change. Proceedings of the National Academy of Sciences, USA 98: 62216226.
  • Wilf P, Labandeira CC, Johnson KR, Cúneo NR. 2005b. Richness of plant–insect associations in Eocene Patagonia: a legacy for South American biodiversity. Proceedings of the National Academy of Sciences, USA 102: 89448948.
  • Wilf P, Little SA, Iglesias A, Zamaloa MC, Gandolfo MA, Cúneo NR, Johnson KR. 2009. Papuacedrus (Cupressaceae) in Eocene Patagonia: a new fossil link to Australasian rainforests. American Journal of Botany 96: 20312047.
  • Wilf P, Wing SL, Greenwood DR, Greenwood CL. 1998. Using fossil leaves as paleoprecipitation indicators: an Eocene example. Geology 26: 203206.
  • Wilf P, Wing SL, Greenwood DR, Greenwood CL. 1999. Using fossil leaves as paleoprecipitation indicators: an Eocene example: reply. Geology 27: 92.
  • Wing S, Greenwood DR. 1993. Fossils and fossil climate: the case for equable continental interiors in the Eocene. Philosophical Transactions of the Royal Society of London B 341: 243252.
  • Wing S, Bao H, Koch PL. 2000. An Eocene cool period? Evidence for continental cooling during the warmest part of the Cenozoic. In: Huber BT, MacCleod KG, Wing S, eds. Warm climates in earth history. Cambridge, UK: Cambridge University Press, 197237.
  • Wing SL, Harrington GJ, Smith FA, Bloch JI, Boyer DM, Freeman KH. 2005. Transient floral change and rapid global warming at the Paleocene–Eocene boundary. Science 230: 993996.
  • Wing SL, Bloch JI, Bowen GJ, Boyer DM, Chester S, Diefendorf AF, Harrington GJ, Kraus MJ, Secord R, Smith FA. 2009a. Coordinated sedimentary and biotic change during the Paleocene–Eocene Thermal Maximum in the Bighorn Basin, Wyoming, USA. In: Crouch EM, Strong CP, Hollis CJ, eds. Climatic and Biotic Events of the Paleogene (CBEP 2009), extended abstracts from an international conference in Wellington, New Zealand, 12–15 January 2009. GNS Science Miscellaneous Series 18: 156162.
  • Wing SL, Herrera F, Jaramillo CA, Gómez-Navarro C, Wilf P, Labandeira CC. 2009b. Late Paleocene fossils from the Cerrejón Formation, Colombia, are the earliest record of neotropical rainforest. Proceedings of the National Academy of Sciences, USA 106: 1862718632.
  • Wolfe JA. 1979. Temperature parameters of humid to mesic forests of eastern Asia and relation to forests of other regions in the Northern Hemisphere and Australasia. United States Geological Survey Professional Paper 1106: 137.
  • Wolfe JA. 1993. A method of obtaining climatic parameters from leaf assemblages. United States Geological Survey Bulletin 2040: 171.
  • Wolfe JA. 1995. Paleoclimatic estimates from Tertiary leaf assemblages. Annual Review of Earth and Planetary Sciences 23: 119142.
  • Wolfe JA, Upchurch Jr GR. 1987. North American nonmarine climates and vegetation during the Late Cretaceous. Palaeogeography, Palaeoclimatology, Palaeoecology 61: 3377.
  • Wolfe JA, Wehr WC. 1987. Middle Eocene dicotyledonous plants from Republic, northeastern Washington. United States Geological Survey Bulletin 1597: 125.
  • Yang J, Wang Y-F, Spicer RA, Mosbrugger V, Li C-S, Sun Q-G. 2007. Climatic reconstruction at the Miocene Shanwang basin, China, using leaf margin analysis, CLAMP, coexistence approach, and overlapping distribution analysis. American Journal of Botany 94: 599608.
  • Zachos J, Pagani M, Sloan L, Thomas E, Billups K. 2001. Trends, rhythms, and aberrations in global climate 65 Ma to present. Science 292: 686693.