Journal article
Big trees of small baskets: phylogeny of the Australian genus Spyridium (Rhamnaceae: Pomaderreae), focusing on biogeographic patterns and species circumscriptions
Catherine Clowes, Rachael M Fowler, Patrick S Fahey, Jurgen Kellermann, Gillian K Brown, Michael J Bayly
AUSTRALIAN SYSTEMATIC BOTANY | CSIRO PUBLISHING | Published : 2022
DOI: 10.1071/SB21034
Abstract
Spyridium Fenzl is a genus of ~45 species endemic to south-western and south-eastern Australia. This study provides the most comprehensive phylogenies of Spyridium to date, analysing both entire chloroplast genomes and the nuclear ribosomal array (18S –5.8S –26S). There was substantial incongruence between the chloroplast and nuclear phylogenies, creating phylogenetic uncertainty, but some clear relationships and biogeographic patterns could be established. Analyses support the monophyly of Spyridium , identifying an early east–west split at the base of the nuclear phylogeny and deep divergences of New South Wales and Tasmanian endemic clades. We also found evidence of more recent dispersal ..
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Funding Acknowledgements
This project was supported by a Holsworth Wildlife Research Endowment administered by The Ecological Society of Australia, and the Hansjorg Eichler Scientific Research Fund provided by the Australasian Systematic Botany Society. Support was also provided by a Megan Klemm Postgraduate Research Award, a Sophie Ducker Postgraduate Scholarship (both administered by The University of Melbourne Botany Foundation) and a Dame Margaret Blackwood Soroptimist Scholarship (managed by Soroptimist International). The revision of the family Rhamnaceae for the Flora of Australia (Kellermann et al. 2022) has been supported by several grants from the Australian Biological Resources Study (Canberra, ACT, Australia).