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  • Speciation and phylogeography in Caridina indistincta, a complex of freshwater shrimps from Australian heathland streams

    Author(s)
    Chenoweth, SF
    Hughes, JM
    Griffith University Author(s)
    Hughes, Jane M.
    Chenoweth, Stephen
    Year published
    2003
    Metadata
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    Abstract
    The Caridina indistincta complex is a group of closely related atyid shrimps that inhabit coastal freshwater streams throughout north-eastern Australia. Using mitochondrial DNA sequence data (cytochrome oxidase 1, CO1), we (1) inferred the timing of speciation in the C. indistincta group and (2) examined the intraspecific phylogeographic patterns within the group. Assuming a shrimp-specific rate of CO1 evolution, the level of sequence divergence among species suggests that speciation took place during the Miocene epoch. Within one widespread mainland species, phylogeographic patterns suggest strong geographic 'regionalisation' ...
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    The Caridina indistincta complex is a group of closely related atyid shrimps that inhabit coastal freshwater streams throughout north-eastern Australia. Using mitochondrial DNA sequence data (cytochrome oxidase 1, CO1), we (1) inferred the timing of speciation in the C. indistincta group and (2) examined the intraspecific phylogeographic patterns within the group. Assuming a shrimp-specific rate of CO1 evolution, the level of sequence divergence among species suggests that speciation took place during the Miocene epoch. Within one widespread mainland species, phylogeographic patterns suggest strong geographic 'regionalisation' of mtDNA lineages that are most likely of Pleistocene origin. By contrast, another species comprises two highly divergent mtDNA lineages that occur in sympatry. We suggest that although Pleistocene sea-level regressions appear important in generating population-level phylogeographic patterns, these events were largely unimportant in the formation of species in this group.
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    Journal Title
    Marine and Freshwater Research
    Volume
    54
    Publisher URI
    http://www.publish.csiro.au/nid/126.htm
    DOI
    https://doi.org/10.1071/MF02168
    Subject
    History, heritage and archaeology
    Publication URI
    http://hdl.handle.net/10072/6003
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