Snakes across the Strait: trans-Torresian phylogeographic relationships in three genera of Australasian snakes (Serpentes: Elapidae: Acanthophis, Oxyuranus, and Pseudechis)
Wüster, Wolfgang, Dumbrell, Alex J., Hay, Chris, Pook, Catharine E., Williams, David J., and Fry, Bryan Grieg (2005) Snakes across the Strait: trans-Torresian phylogeographic relationships in three genera of Australasian snakes (Serpentes: Elapidae: Acanthophis, Oxyuranus, and Pseudechis). Molecular Phylogenetics and Evolution, 34 (1). pp. 1-14.
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We analyze the phylogeny of three genera of Australasian elapid snakes (Acanthophis—death adders; Oxyuranus—taipans; Pseudechis—blacksnakes), using parsimony, maximum likelihood, and Bayesian analysis of sequences of the mitochondrial cytochrome b and ND4 genes. In Acanthophis and Pseudechis, we find evidence of multiple trans-Torresian sister-group relationships. Analyses of the timing of cladogenic events suggest crossings of the Torres Strait on several occasions between the late Miocene and the Pleistocene. These results support a hypothesis of repeated land connections between Australia and New Guinea in the late Cenozoic. Additionally, our results reveal undocumented genetic diversity in Acanthophis and Pseudechis, supporting the existence of more species than previously believed, and provide a phylogenetic framework for a reinterpretation of the systematics of these genera. In contrast, our Oxyuranus scutellatus samples from Queensland and two localities in New Guinea share a single haplotype, suggesting very recent (late Pleistocene) genetic exchange between New Guinean and Australian populations.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||Acanthophis; Arafura Shelf; Australia; New Guinea; mitochondrial DNA; Oxyuranus; phylogeography; Pseudechis|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%|
|Deposited On:||30 Nov 2010 12:53|
|Last Modified:||18 Oct 2013 01:08|
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