n African Zoology - Deep genetic divergence between geographically isolated populations of the goldie barb () in South Africa : potential taxonomic and conservation implications

Volume 50, Issue 1
  • ISSN : 1562-7020
  • E-ISSN: 2224-073X
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as it is presently defined has a disjunct distribution that is divided between northern and southern populations in South Africa. Sequence data from the cytochrome b gene region showed two distinct lineages that correspond to these geographically distant areas. Divergence between these two lineages was relatively high (5.5-6.5%) and comparable to typical interspecific divergences found between closely related southern African cyprinid fishes. Based on this deep genetic divergence, we conclude that the northern lineage may represent a previously unrecognised species or may belong to a different, but known species or species complex not associated with 'true' . These findings add to a growing body of evidence that freshwater fish diversity in southern Africa requires major revision.

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