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Science in China Series D: Earth Sciences

, Volume 50, Issue 10, pp 1525–1535 | Cite as

Fossil nothofagaceous leaves from the Eocene of western Antarctica and their bearing on the origin, dispersal and systematics of Nothofagus

  • Li HaoMin
  • Zhou ZheKun
Article

Abstract

Fossil leaves resembling Nothofagaceae have been investigated from the Eocene of western Antarctica and a new form genus Nothofagofolia is proposed for these kinds of fossils. Some new specimens belonging to this form genus are described. They were collected from the Fossil Hill locality of Fildes Peninsula, King George Island, South Shetland Islands, western Antarctica. Two new species, two new combinations and an unnamed species are reported. A number of published Nothofagus leaf fossils from the same locality are discussed and revised. As a result of these studies of Nothofagus leaf morphology, we conclude that (1) Nothofagus probably originated in high latitudes of the Southern Hemisphere during the middle-late Late Cretaceous and diversified, dispersed gradually to the lower latitudes of the same hemisphere; (2) leaf morphological characters are significant for the systematics of the family Nothofagaceae, especially at the intrageneric level; and (3) extant species of Nothofagus known from southern temperate areas have more primitive leaf morphological characters and lower leaf ranks than those from tropical mountains as well as those of the Fagaceae and Betulaceae.

Keywords

Antarctica Nothofagus leaf morphology leaf impression fossils Gondwanaland Nothofagofolia gen. et sp. nov Eocene 

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Copyright information

© Science in China Press 2007

Authors and Affiliations

  1. 1.State Key Laboratory of Palaeobiology & Stratigraphy, Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjingChina
  2. 2.Key Laboratory of Biodiversity and Biogeography, Kunming Institute of BotanyChinese Academy of SciencesKunmingChina

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