Molecular evidence for ten species and Oligo-Miocene vicariance within a nominal Australian gecko species (<Emphasis Type="Italic">Crenadactylus ocellatus</Emphasis>, Diplodactylidae) |
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Authors: | Paul M Oliver Mark Adams Paul Doughty |
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Institution: | 1.Australian Centre for Evolutionary Biology and Biodiversity,The University of Adelaide,Adelaide,Australia;2.South Australian Museum,Adelaide,Australia;3.Evolutionary Biology,South Australian Museum,Adelaide,Australia;4.Terrestrial Zoology,Western Australian Museum,Welshpool,Australia |
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Abstract: | Background Molecular studies have revealed that many putative 'species' are actually complexes of multiple morphologically conservative,
but genetically divergent 'cryptic species'. In extreme cases processes such as non-adaptive diversification (speciation without
divergent selection) could mask the existence of ancient lineages as divergent as ecologically and morphologically diverse
radiations recognised as genera or even families in related groups. The identification of such ancient, but cryptic, lineages
has important ramifications for conservation, biogeography and evolutionary biology. Herein, we use an integrated multilocus
genetic dataset (allozymes, mtDNA and nuclear DNA) to test whether disjunct populations of the widespread nominal Australian
gecko species Crenadactylus ocellatus include distinct evolutionary lineages (species), and to examine the timing of diversification among these populations. |
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