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Molecular phylogeny of the antitropical subgenus Goniistius (Perciformes: Cheilodactylidae: Cheilodactylus): evidence for multiple transequatorial divergences and non-monophyly
Burridge, CP and White, RWG (2000) Molecular phylogeny of the antitropical subgenus Goniistius (Perciformes: Cheilodactylidae: Cheilodactylus): evidence for multiple transequatorial divergences and non-monophyly. Biological Journal of the Linnean Society, 70. pp. 435-458.
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The subgenus Goniistius comprises eight species of marine nearshore fishes which are antitropically distributed. The molecular phylogeny of these and other cheilodactylids was reconstructed from cytochrome oxidase I and cytochrome b mitochondrial DNA sequences. The placement within Goniistius of the morphologically divergent species Cheilodactylus (G.) nigripes was not supported. The remaining seven species are sufficiently divergent from other cheilodactylids to be designated as a separate genus. The antitropical distribution of Goniistius is the result of three transequatorial divergences, which occurred during two periods. Based on molecular clock calibrations, these periods are suggested to be the mid Miocene, and late Miocene to early Pliocene. It is not known in which direction or by which mechanism these transequatorial divergences occurred, although biogeographic hypotheses of Mesozoic or Pleistocene separations can be discounted. The degree of genetic divergence between North and South Pacific populations of C. (G.) vittatus Garrett indicates that they have undergone cryptic speciation.
|Keywords:||phylogeography, molecular clock, cryptic speciation, dispersal, vicariance, mitochondrial DNA, systematics|
|Journal or Publication Title:||Biological Journal of the Linnean Society|
|Page Range:||pp. 435-458|
|Identification Number - DOI:||10.1006/bijl.1999.0413|
|Additional Information:||The definitive version is available at http://www.blackwellpublishing.com/journal.asp?ref=0024-4066&site=1|
|Date Deposited:||05 Jan 2007|
|Last Modified:||18 Nov 2014 03:12|
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