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Araucaria section Eutacta macrofossils from the Cenozoic of Southeastern Australia


Hill, RS and Jordan, GJ and Carpenter, RJ and Paull, R, Araucaria section Eutacta macrofossils from the Cenozoic of Southeastern Australia, International Journal of Plant Sciences, 180, (8) pp. 902-921. ISSN 1058-5893 (2019) [Refereed Article]

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DOI: doi:10.1086/704829


Premise of research. We collate and interpret previously undescribed foliar material of Araucaria section Eutacta from Australian Cenozoic sediments.

Methodology. The fossils we describe here were collected over several decades and were identified by direct comparisons with extant and fossil species using light and scanning electron microscopy.

Pivotal results. Fossil leaves and leafy shoots of three new species of Araucaria section Eutacta (A. macrophylla, A. mollifolia, and A. balfourensis), along with new records of the previously described A. planus, are described from eight localities in southeastern Australia, spanning the early Eocene to the early Miocene.

Conclusions. These well-preserved fossils add significantly to our knowledge of Araucaria and confirm the dominance of the section Eutacta compared with other sections in the region during that time. The range of leaf morphology exhibited is similar to that seen in extant New Caledonian species and probably reflects past phases of radiation in similar wet climates.

Item Details

Item Type:Refereed Article
Keywords:Araucaria, Araucariaceae, conifers, Cenozoic, Australia
Research Division:Earth Sciences
Research Group:Geology
Research Field:Palaeontology (incl. palynology)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Jordan, GJ (Professor Greg Jordan)
ID Code:150462
Year Published:2019
Funding Support:Australian Research Council (DP160100809)
Web of Science® Times Cited:1
Deposited By:Plant Science
Deposited On:2022-06-16
Last Modified:2022-06-16

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