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PLOS ONE  2011 

Oldest Known Eucalyptus Macrofossils Are from South America

DOI: 10.1371/journal.pone.0021084

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Abstract:

The evolutionary history of Eucalyptus and the eucalypts, the larger clade of seven genera including Eucalyptus that today have a natural distribution almost exclusively in Australasia, is poorly documented from the fossil record. Little physical evidence exists bearing on the ancient geographical distributions or morphologies of plants within the clade. Herein, we introduce fossil material of Eucalyptus from the early Eocene (ca. 51.9 Ma) Laguna del Hunco paleoflora of Chubut Province, Argentina; specimens include multiple leaves, infructescences, and dispersed capsules, several flower buds, and a single flower. Morphological similarities that relate the fossils to extant eucalypts include leaf shape, venation, and epidermal oil glands; infructescence structure; valvate capsulate fruits; and operculate flower buds. The presence of a staminophore scar on the fruits links them to Eucalyptus, and the presence of a transverse scar on the flower buds indicates a relationship to Eucalyptus subgenus Symphyomyrtus. Phylogenetic analyses of morphological data alone and combined with aligned sequence data from a prior study including 16 extant eucalypts, one outgroup, and a terminal representing the fossils indicate that the fossils are nested within Eucalyptus. These are the only illustrated Eucalyptus fossils that are definitively Eocene in age, and the only conclusively identified extant or fossil eucalypts naturally occurring outside of Australasia and adjacent Mindanao. Thus, these fossils indicate that the evolution of the eucalypt group is not constrained to a single region. Moreover, they strengthen the taxonomic connections between the Laguna del Hunco paleoflora and extant subtropical and tropical Australasia, one of the three major ecologic-geographic elements of the Laguna del Hunco paleoflora. The age and affinities of the fossils also indicate that Eucalyptus subgenus Symphyomyrtus is older than previously supposed. Paleoecological data indicate that the Patagonian Eucalyptus dominated volcanically disturbed areas adjacent to standing rainforest surrounding an Eocene caldera lake.

References

[1]  Wilf P, Cúneo NR, Johnson KR, Hicks JF, Wing SL, et al. (2003) High plant diversity in Eocene South America: evidence from Patagonia. Science 300: 122–125.
[2]  Wilf P, Johnson KR, Cúneo NR, Smith ME, Singer BS, et al. (2005) Eocene plant diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina. Amer Naturalist 165: 634–650, appendix (14 pgs.).
[3]  Berry EW (1925) A Miocene flora from Patagonia. Johns Hopkins Univ Stud Geol 6: 182–252.
[4]  Azpelicueta MM, Cione AL (2011) Redescription of the Eocene catfish Bachmannia chubutensis (Teleostei: Bachmanniidae) of southern South America. J Vert Paleontol 31: 258–269.
[5]  Petrulevi?ius JF (2009) A panorpoid (Insecta: Mecoptera) from the lower Eocene of Patagonia, Argentina. J Paleontol 83: 994–997.
[6]  Petrulevi?ius JF, Nel A (2005) Austroperilestidae, a new family of damselflies from early Eocene of Argentina (Insecta: Odonata). Phylogenetic relationships within Odonata. Paleontol 79: 658–662.
[7]  Ladiges PY, Udovicic F, Nelson G (2003) Australian biogeographical connections and the phylogeny of large genera in the plant family Myrtaceae. J Biogeogr 30: 989–998.
[8]  Pryor LD, Johnson LAS (1981) Eucalyptus, the universal Australian. In: Keast A, editor. Ecological biogeography of Australia. The Hague: Dr. W. Junk Publishers. pp. 499–536.
[9]  Parra-O C, Bayly M, Drinnan A, Udovicic F, Ladiges PY (2009) Phylogeny, major clades and infrageneric classification of Corymbia (Myrtaceae), based on nuclear ribosomal DNA and morphology. Aus Syst Bot 22: 384–399.
[10]  Boland DJ, Brooker MIH, Chippendale GM, Hall N, Hyland BPM, et al. (2006) Forest trees of Australia, fifth edition. Collingwood, Victoria, Australia: CSIRO Publishing. 736 p.
[11]  Johnson LAS (1972) Evolution and classification in Eucalyptus. Proc Linn Soc N S W 97: 11–29.
[12]  Slee AV, Brooker MIH, Duffy SM, West JG (2006) EUCLID, eucalypts of Australia, third edition. Collingwood, Victoria, Australia: CSIRO Publishing.
[13]  Chippendale GM (1988) Eucalyptus, Angophora. In: George AS, editor. Flora of Australia volume 19. Myrtaceae—Eucalyptus, Angophora. Canberra: Australian Government Publishing Service. pp. 1–494.
[14]  Pryor LD, Johnson LAS (1971) A classification of the eucalypts. Canberra: The Australian National University.. 102 p.
[15]  Bohte A, Drinnan A (2005) Floral development and systematic position of Arillastrum, Allosyncarpia, Stockwellia and Eucalyptopsis (Myrtaceae). Pl Syst Evol 251: 53–70.
[16]  Drinnan AN, Ladiges PY (1991) Floral development in the ‘Symphyomyrtus group’ of eucalypts (Eucalyptus: Myrtaceae). Aus Syst Bot 4: 553–562.
[17]  Hill KD, Johnson LAS (1995) Systematic studies in the eucalypts. 7. A revision of the bloodwoods, genus Corymbia (Myrtaceae). Telopea 6: 185–504.
[18]  Parra-O C, Bayly M, Udovicic F, Ladiges PY (2006) ETS sequences support the monophyly of the eucalypt genus Corymbia (Myrtaceae). Taxon 55: 653–663.
[19]  Udovicic F, Ladiges PY (2000) Informativeness of nuclear and chloroplast DNA regions and the phylogeny of the eucalypts and related genera (Myrtaceae). Kew Bull 55: 633–645.
[20]  Steane DA, Nicolle D, McKinnon GE, Vaillancourt RE, Potts BM (2002) Higher-level relationships among the eucalypts are resolved by ITS-sequence data. Aus Syst Bot 15: 49–62.
[21]  Whittock S, Steane DA, Vaillancourt RE, Potts BM (2003) Molecular evidence shows that the tropical boxes (Eucalyptus subgenus Minutifructus) are over-ranked. Trans R Soc S Aust 127: 27–32.
[22]  Carr DJ, Carr SGM (1959) Floral morphology and the taxonomy of Eucalyptus. Nature 4698: 1549–1552.
[23]  Brooker MIH, Kleinig DA (1994) Field guide to Eucalyptus Volume 3, northern Australia. Sydney: Inkata Press. 383 p.
[24]  Ladiges PY, Udovicic F, Drinnan AN (1995) Eucalypt phylogeny—molecules and morphology. Aus Syst Bot 8: 483–497.
[25]  Drinnan AN, Ladiges PY (1988) Perianth development in Angophora and the bloodwood eucalypts (Myrtaceae). Pl Syst Evol 160: 219–239.
[26]  Drinnan AN, Ladiges PY (1991) Floral development and systematic position of Eucalyptus curtisii (Myrtaceae). Aus Syst Bot 4: 539–551.
[27]  Bayly MJ, Udovicic F, Gibbs AK, Parra-O C, Ladiges PY (2008) Ribosomal DNA pseudogenes are widespread in the eucalypt group (Myrtaceae): implications for phylogenetic analysis. Cladistics 24: 131–146.
[28]  Crisp M, Cook L, Steane D (2004) Radiation of the Australian flora: what can comparisons of molecular phylogenies across multiple taxa tell us about the evolution of diversity in present-day communities? Phil Trans R Soc Lond B 359: 1551–1571.
[29]  Ladiges PY, Cantrill D (2007) New Caledonia-Australian connections: biogeographic patterns and geology. Aus Syst Bot 20: 383–389.
[30]  Hill RS, Truswell EM, McLoughlin S, Dettman ME (1999) Evolution of the Australian flora: fossil evidence. In: Orchard AE, editor. Flora of Australia, volume 1, 2nd edition. Australia: ABRS/CSIRO. pp. 251–320.
[31]  Basinger JF, Greenwood DR, Wilson PG, Christophel DC (2007) Fossil flowers and fruits of capsular Myrtaceae from the Eocene of South Australia. Can J Earth Sci 85: 204–215.
[32]  Holmes WBK, Holmes FM, Martin HA (1982) Fossil Eucalytpus remains from the Middle Miocene Chalk Mountain Formation, Warrumbungle Mountains, New South Wales. Proc Linn Soc N S W 106: 299–310.
[33]  Pole M (1993) Early Miocene flora of the Manuherikia Group, New Zealand. 7. Myrtaceae, including Eucalyptus. J Roy Soc New Zeal 23: 313–328.
[34]  Rozefelds AC (1996) Eucalyptus phylogeny and history: a brief summary. Tasforests 8: 15–26.
[35]  Greenwood DR (1996) Eocene monsoon forests in central Australia? Aus Syst Bot 9: 95–112.
[36]  Greenwood DR, Vadala AJ, Douglas JG (2000) Victorian Paleogene and Neogene macrofloras: a conspectus. Proc Roy Soc Victoria 112: 65–92.
[37]  Ambrose GJ, Callen RA, Flint RB (1979) Eucalyptus fruits in stratigraphic context in Australia. Nature 280: 387–389.
[38]  Lange RT (1978) Carpological evidence for fossil Eucalyptus and other Leptospermeae (subfamily Leptospermoideae of Myrtaceae) from a Tertiary deposit in the South Australian arid zone. Aust J Bot 26: 221–233.
[39]  Lange RT (1982) Australian Tertiary vegetation. In: Smith JMB, editor. A History of Australasian Vegetation. Sydney: McGraw-Hill Book Company. pp. 44–89.
[40]  Biffin E, Lucas EJ, Craven LA, Ribeiro da Costa I, Harrington MG, et al. (2010) Evolution of exceptional species richness among lineages of fleshy-fruited Myrtaceae. Ann Bot 106: 79–93.
[41]  Frenguelli J (1953) Restos del genera Eucalyptus en la Mioceno del Neuquén. Not Mus Nac 16: 209–213.
[42]  Johnson LAS, Briggs BG (1984) Myrtales and Myrtaceae—a phylogenetic analysis. Ann Missouri Bot Gard 71: 700–756.
[43]  Berry EW (1938) Tertiary flora from the Río Pichileufú, Argentina. Geol Am Spec Papers 12: 1–149.
[44]  Wilf P, Little SA, Iglesias A, Zamaloa MC, Gandolfo MA, et al. (2009) Papuacedrus (Cupressaceae) in Eocene Patagonia: a new fossil link to Australasian rainforests. Amer J Bot 96: 2031–2047.
[45]  Zamaloa MC, Gandolfo MA, González CC, Romero EJ, Cúneo NR, et al. (2006) Casuarinaceae from the Eocene of Patagonia, Argentina. Int J Plant Sci 167: 1279–1289.
[46]  Gandolfo MA, Dibbern MC, Romero EJ (1988) Akania patagonica n. sp. and additional material on Akania americana Romero & Hickey (Akaniaceae) from Paleocene sediments of Patagonia. Bull Torrey Bot Club 115: 83–88.
[47]  Pascual R, Ortiz-Jaureguizar E (2007) The Gondwanan and South American episodes: two major and unrelated moments in the history of the South America mammals. J Mammal Evol 14: 75–137.
[48]  Aragón E, Mazzoni MM (1997) Geología y estratigrafía del complejo volcánico piroclástico del Río Chubut medio (Eoceno), Chubut, Argentina. Rev Asoc Geol Arg 52: 243–256.
[49]  Paijmans K (1973) Plant succession on Pago and Witori Volcanoes, New Britain. Pacific Sci 27: 260–268.
[50]  Heather WA (1955) The kamarere forests of New Britain. Empire Forest Rev 34: 255–278.
[51]  Buechler WK (2004) Alternative leaf clearing and mounting procedures. Bot Soc Amer Abstract ID 70. Available: http://www.2004.botanyconference.org/eng?ine/search/index.php Accessed 2010 Dec 18.
[52]  Ladiges PY, Humphries CJ (1983) A cladistic study of Arillastrum, Angophora, and Eucalyptus (Myrtaceae). Bot J Linn Soc 87: 105–134.
[53]  Wilson PG, O'Brien MM, Gadek PA, Quinn CJ (2001) Myrtaceae revisited: a reassessment of infrafamilial groups. Amer J Bot 88: 2013–2025.
[54]  Bayly M, Ladiges PY (2007) Divergent paralogues of ribosomal DNA in eucalypts (Myrtaceae). Mol Phyl Evol 44: 346–356.
[55]  Nixon KC (1999–2010) WinClada ver. 1.9. Software for phylogenetic analysis. Ithaca, New York, USA.
[56]  Carr DJ, Carr SGM, Hyland BPM, Wilson PG, Ladiges PY (2002) Stockwellia quadrifida (Myrtaceae), a new Australian genus and species in the eucalypt group. Bot J Linn Soc 139: 415–421.
[57]  Blake ST (1977) Allosyncarpia ternata, a new genus and species of Myrtaceae subfamily Leptospermoideae from northern Australia. Austrobaileya 1: 43–46.
[58]  Christophel DC, Hyland BPM (1993) Leaf atlas of Australian tropical rain forest trees. East Melbourne, Victoria, Australia: CSIRO.. 260 p.
[59]  Briggs BG, Johnson LAS (1979) Evolution in the Myrtaceae—evidence from inflorescence structure. Proc Linn Soc N S W 102: 158–256.
[60]  Bohte A, Drinnan A (2005) Ontogeny, anatomy and systematic significance of ovular structures in the ‘eucalypt group’ (Eucalypteae, Myrtaceae). Pl Syst Evol 255: 17–39.
[61]  Goloboff PA, Farris S, Nixon KC (2007) TNT (Tree analysis using New Technology) ver. 1.1 for Windows.
[62]  Goloboff PA, Farris JS, Nixon KC (2008) TNT, a free program for phylogenetic analysis. Cladistics 24: 774–786.
[63]  Goloboff PA (1999) Analyzing large data sets in reasonable times: solutions for composite optima. Cladistics 15: 415–428.
[64]  Nixon KC (1999) The parsimony ratchet, a new method for rapid parsimony analysis. Cladistics 15: 407–414.
[65]  Goloboff PA (1999) NONA (NO NAME). 2.0 for Windows.
[66]  Brooker MIH (2000) A new classification of the genus Eucalyptus L'Hér. (Myrtaceae). Aus Syst Bot 13: 79–148.

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