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|Title:||A molecular assessment of species boundaries and phylogenetic affinities in Mogurnda (Eleotridae): a case study of cryptic biodiversity in the Australian freshwater fishes|
|Citation:||Marine and Freshwater Research, 2013; 64(10):920-931|
|Publisher:||C S I R O Publishing|
|Mark Adams, Timothy J. Page, David A. Hurwood, and Jane M. Hughes|
|Abstract:||As the driest inhabitable continent, it comes as no surprise that Australia has comparatively few species of freshwater-dependent fishes compared with land masses of similar size and latitudinal coverage. In addition to relatively low rainfall and few permanent waterbodies, a range of other climatic, geological, physical, and biogeographical factors are generally offered up, to account for the low species count in a country otherwise regarded as mega-biodiverse. Here, we challenge this traditional view by hypothesising that Australia’s lack of freshwater fishes largely reflects a dearth of detailed taxonomic activity. Using both allozyme and mtDNA markers, we undertook a molecular assessment on the Australian purple-spotted gudgeons (Mogurnda), recently subjected to a taxonomic revision that saw a three-fold increase in the number of described species. In addition to demonstrating additional, species-level biodiversity within M. adspersa, our genetic data revealed discordant patterns of mitochondrial and nuclear genetic affinities among populations in several species, plus a sister relationship between the two central Australian species. We discuss the broader implications of such cryptic biodiversity for the Australian freshwater fish fauna; most notable among these is our prediction that only 50% of species have been described.|
|Keywords:||cryptic species; M. mogurnda; molecular systematics; phylogeography; taxonomic impediment; US fishes|
|Rights:||Copyright status unknown|
|Appears in Collections:||Earth and Environmental Sciences publications|
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