Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/39035
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Type: Journal article
Title: Preface to 'Evolution, Extinction and Biogeography in Gondwana'
Author: Hill, R.
Citation: Australian Journal of Botany, 2001; 49(3):I-II
Publisher: C S I R O Publishing
Issue Date: 2001
ISSN: 0067-1924
1444-9862
Statement of
Responsibility: 
Robert S. Hill
Abstract: The macrofossil record of the plant family Cunoniaceae in Australia is summarised and reviewed where necessary by using detailed studies of the morphology of extant genera. Eleven of the 26 Cunoniaceae genera are represented in the Australian macrofossil record and include leaves and leaf fragments, foliar cuticle and reproductive structures, and range from Late Paleocene to Quaternary in age. Macrofossils show that some genera had a different or more widespread distribution in Australia during the Cenozoic, with two genera (Weinmannia and Codia) having become extinct from the continent. Changes in climate, including increasing cold, frost, dryness, seasonality, or some combination of these, or a reduction in vegetation disturbance regimes (e.g. volcanism, uplifting, landslips), may be implicated in the regional or continental extinctions demonstrated by the macrofossil record. Many extant genera (Schizomeria, Vesselowskya, Callicoma, Ceratopetalum, Acsmithia, Codia) had evolved by the Early Oligocene or earlier (Eucryphia, Late Paleocene; Ceratopetalum, Middle Eocene), perhaps with generic diversification more or less complete by the end of the Early Cenozoic or earlier. A Cretaceous origin of the family is possible, and may account for its widespread distribution on Southern Hemisphere landmasses, although long-distance dispersal events are required to explain some modern geographic disjunctions.
Rights: © CSIRO 2001
RMID: 0020012804
DOI: 10.1071/BTv49n3_PR
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute Leaders publications

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