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Comments on the Role of Cycadophytes in Antarctic Fossil Floras

  • T. Delevoryas

Abstract

As in previous works, references to cycadophytes include members of both the Cycadales (or Nilssoniales) and Cycadeoidales (Bennettitales). Even though the two groups are distinct enough to be placed into separate divisions (Delevoryas 1975; Taylor 1981), it continues to be useful to refer to them together. They very often occur together in Mesozoic sediments, and both apparently reflect similar kinds of environments. Both the Cycadales (now represented by only 10 genera) and the Cycadeoidales (which are extinct) were important components of Mesozoic biotas worldwide. What appear to be the same, or closely related, genera occur in widely separated localities.

Keywords

Early Cretaceous Middle Triassic Fossil Plant South Shetland Island South Orkney Island 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Anderson JM, Anderson HM (1985) Palaeoflora of Southern Africa. Prodromus of South African Megafloras Devonian to Lower Cretaceous. A.A. Balkema, RotterdamGoogle Scholar
  2. Archangelsky A, Brett DW (1963) Studies on Triassic plants from Argentina. II. Michelilloa walto- niino v. gen. et sp. from the Ischigualasto Formation. Annals of Botany (New Series) 27: 147–154Google Scholar
  3. Daugherty LH (1941) The Upper Triassic flora of Arizona, with a discussion of its geologic occurrence by H.R. Stagner. Carnegie Institution of Washington Publication 526:108ppGoogle Scholar
  4. Delevoryas T (1975) Mesozoic cycadophytes. In Campbell KSW (ed) Gondwana Geology. Papers from the Third International Gondwana Symposium Canberra, Australia, 1973. Australian National University Press, Canberra, A.C.T., Section 2. Gondwana flora 15: 173–191Google Scholar
  5. Delevoryas T (1982) Perspectives on the origin of cycads and cycadeoids. Review of Paleobotany and Palynology 37: 115–132CrossRefGoogle Scholar
  6. Delevoryas T, Hope RC (1971) A new Triassic cycad and its phylogenetic implications. Postilla 150: 1–21Google Scholar
  7. Drinnan AN, Chambers TC (1985) A reassessment of Taeniopteris daintreeifrom the Victorian Early Cretaceous: a member of the Pentoxylales and a significant Gondwanaland plant. Australian Journal of Botany 33: 89–100CrossRefGoogle Scholar
  8. Farquharson GW (1984) Late Mesozoic, non- marine, conglomeratic sequences of northern Antarctic Peninsula (the Botany Bay Group). British Antarctic Survey Bulletin 65: 1–32Google Scholar
  9. Florin R (1933) Studien über die Cycadales des Mesozoikums nebst Erörterungen über die Spaltöffnungsapparate der Bennettitales. Kungl. Svenska Vetenskapsakademiens Handligar 3rd ser. 12 (5): 1–134Google Scholar
  10. Florin R (1940) The Tertiary fossil conifers of south Chile and their phytogeographical significance with a review of the fossil conifers of southern lands. Kungl. Svenska Vetenkapsakademiens Handligar 3rd ser. 19: 1–107Google Scholar
  11. Florin R (1940) The Tertiary fossil conifers of south Chile and their phytogeographical significance with a review of the fossil conifers of southern lands. Kungl. Svenska Vetenkapsakademiens Handligar 3rd ser. 19: 1–107Google Scholar
  12. Gould RE (1971) Lyssoxylon grigsbyi, a cycad trunk from the Upper Triassic of Arizona and New Mexico. American Journal of Botany 58:239–248Google Scholar
  13. Greguss P (1968) Xylotomy of the Living Cycads with a Description of their Leaves and Epidermis. Akadémiai Kiadó, BudapestGoogle Scholar
  14. Halle TG (1913) The Mesozoic flora of Graham Land. Wissensch. Ergebn. Schwed. Südpolar- Exped., 1901–1903, 3 (14): 1–123Google Scholar
  15. Lacey WS, Lucas RC (1981) The Triassic flora of Livingston Island, South Shetland Islands. British Antarctic Survey Bulletin 53: 157–173Google Scholar
  16. Mamay SH (1969) Cycads: fossil evidence of late Paleozoic origin. Science 164: 295–296PubMedCrossRefGoogle Scholar
  17. Mamay SH (1976) Paleozoic origin of the cycads. U.S. Geological Survey Professional Paper 934: 1–48Google Scholar
  18. Plumstead EP (1962) Fossil floras of Antarctica. Trans-Antarctic Expedition 1955–1958. Scientific Reports No. 9, Geology 2: 1–154Google Scholar
  19. Seward AC (1917) Fossil Plants, Vol. III. Cambridge University Press, CambridgeGoogle Scholar
  20. Smoot EL, Taylor TN, Delevoryas T (1985) Structurally preserved fossil plants from Antarctica. I. Antarcticycas, gen. nov., a Triassic cycad stem from the Beardmore Glacier area. American Journal of Botany 72: 1410–1423CrossRefGoogle Scholar
  21. Taylor TN (1981) Paleobotany. An Introduction to Fossil Plant Biology. McGraw-Hill Book Company, New YorkGoogle Scholar
  22. Thomson MRA (1981) Late Mesozoic stratigraphy and invertebrate palaeontology of the South Orkney Islands. British Antarctic Survey Bulletin 54: 65–83Google Scholar
  23. White ME (1986) The Greening of Gondwana. Reed Books Pty. Ltd., Frenchs Forest, N.S.W., 256ppGoogle Scholar
  24. Zhu Jia-Nan, Du Xian-Ming (1981) A new cycad— Primocycas chinensisgen. et sp. nov. from the Lower Permian in Shanxi, China and its significance. Acta Botanica Sinica 23: 401–404Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1990

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  • T. Delevoryas

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