Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/118182
Type: Thesis
Title: Contributions to the Cenozoic macrofossil record of the Myrtaceae in South Eastern Australia
Author: Tarran, Myall Alexander
Issue Date: 2018
School/Discipline: School of Biological Sciences
Abstract: The Myrtaceae are a large and diverse Angiosperm family, containing iconic groups of plants such as the Eucalypts, Lily Pillys, Melaleucas, Ti-Trees, Guavas, Feijoas and Bottlebrushes. The Myrtaceae are a key family in the vegetation of the Southern Hemisphere, and in Australia are often a dominant component of virtually all terrestrial ecosystems, from rainforest to sclerophyll heath. Despite the importance of the family, their macrofossil record is historically poorly studied. In this thesis, the macrofossil record of the Myrtaceae is reviewed, and it is found that the majority of published records of Myrtaceae fossils are poorly identified or equivocal. In the subsequent chapters, macrofossils of myrtaceous affinity from several Cenozoic sites in South Eastern Australia are identified, taking advantage of recent advances in molecular phylogenetic studies of the family, as well as recent fundamental botanical work, to identify fossils in a rigorous phylogenetic framework. Fossils of the capsular-fruited genus Metrosideros, one of the most widely distributed woody, flowering plant genera in the Pacific, are described in Chapters 3 and 4 from Eocene to Oligo-Miocene deposits in Tasmania, including Hasties, Little Rapid River, and the newly discovered Golden Fleece locality. These fossils provide the first evidence of this capsular-fruited genus in Australia, and demonstrate that its absence from the continent is the result of extinction, rather than failure of dispersal. In Chapter 5, fossil leaves of the fleshy-fruited genus Syzygium are described from Miocene sediments of Kiandra, New South Wales, which may provide the first confident identification of non-Eucalypt fossil Myrtaceae leaves using cuticle micromorphological characters. The fossils described in this thesis are among the best described Myrtaceae macrofossils from anywhere in the world, and pose significant advances in the understanding of the fossil record of these key genera within the family, as well a providing a framework upon which the identification of future Myrtaceae macrofossils might be based.
Advisor: Hill, Robert
McInerney, Cesca
Wilson, Peter
Dissertation Note: Thesis (Ph.D.) -- University of Adelaide, School of Biological Sciences, 2018
Keywords: Fossil
Myrtaceae
Cenozoic
cuticle
flowers
fruits
Australia
paleobotany
Provenance: This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals
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