ESR 17:63-71 (2012)  -  DOI: https://doi.org/10.3354/esr00417

Mitochondrial variation among Australian freshwater turtles (genus Myuchelys), with special reference to the Endangered M. bellii 

Darren Fielder1,*, Karl Vernes1, Erika Alacs2, Arthur Georges

1Ecosystem Management, University of New England, Armidale, New South Wales 2351, Australia
2Institute for Applied Ecology, University of Canberra, Australian Capital Territory 2601, Australia

ABSTRACT: Identifying species and the relationships among them remains important for assessing biodiversity trends and is a critical focus for reversing global biodiversity loss. The saw-shelled turtles of Australia, in the genus Myuchelys, show cryptic diversity and include species that range from Endangered (M. bellii), through those that are locally abundant but extremely limited in distribution (M. georgesi and M. purvisi) to those that are common and widespread (M. latisternum). The Endangered M. bellii is restricted to 3 small isolated populations in the headwaters of the Murray-Darling basin, in the Border, Gwydir and Namoi tributaries. There is no evidence of strong differentiation among these 3 populations based on mitochondrial DNA (mtDNA) divergences; rather there is only a shallow genetic structure ranging from 0.1 to 0.3% divergence. The 3 restricted and small populations of the Endangered M. bellii face a number of threatening processes and require conservation management across state boundaries as a single biological species. The mtDNA phylogeny supports previous phylogenetic findings of a deep phylogenetic divergence between M. purvisi and M. georgesi (13.5% mtDNA) and the sister taxa relationship of M. latisternum and M. bellii. A notable exception was our finding that Emydura macquarii and M. georgesi are sister taxa inside the Myuchelys radiation.


KEY WORDS: Emydura macquarii · Myuchelys georgesi · Elseya · Chelidae · Freshwater turtles · Cryptic species


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Cite this article as: Fielder D, Vernes K, Alacs E, Georges A (2012) Mitochondrial variation among Australian freshwater turtles (genus Myuchelys), with special reference to the Endangered M. bellii . Endang Species Res 17:63-71. https://doi.org/10.3354/esr00417

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