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n2:225971

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Victor (2017)

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2017-01-01

dct:title

Victor (2017)

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n4:C1723161-A677-4087-A763-6D2805DA2922

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_:vb70015076 _:vb70015077

dct:abstract

The Pseudojuloides cerasinus species complex is a paradigm of the application of DNA taxonomy to coral-reef fish classification. Once considered a pan-Indo-Pacific species ranging from South Africa to the Hawaiian Islands, P. cerasinus has been divided into three different allopatric species in the Indian Ocean, based on differences in male-display color patterns and relatively deep genetic divergences. In this study, the Pacific Ocean populations are shown to represent four species: the original type population in the Hawaiian Islands; a new western Pacific species Pseudojuloides splendens, ranging from Japan to Australia and across most of the South Pacific; a new species Pseudojuloides polynesica, from French Polynesia and the Line Islands; and Pseudojuloides pyrius Randall & Randall, 1981, endemic to the Marquesas Islands. The mtDNA lineages of the complex diverge from 3.5-11.3% in the sequence of the mtDNA-barcode marker COI. The species illustrate some of the more interesting phenomena in the evolution of species complexes among coral reef fishes: the species differences are mainly in male-display color patterns, the degree of phenotypic divergence does not correlate with the amount of genetic divergence (the most different-appearing species is one of the least divergent), and a corollary that the various genetic lineages must be distinguished to avoid paraphyly in the taxonomic construct of the species complex. A neighbor-joining tree and genetic distance matrix are presented for the seven species of the P. cerasinus species complex.

bibo:abstract

The Pseudojuloides cerasinus species complex is a paradigm of the application of DNA taxonomy to coral-reef fish classification. Once considered a pan-Indo-Pacific species ranging from South Africa to the Hawaiian Islands, P. cerasinus has been divided into three different allopatric species in the Indian Ocean, based on differences in male-display color patterns and relatively deep genetic divergences. In this study, the Pacific Ocean populations are shown to represent four species: the original type population in the Hawaiian Islands; a new western Pacific species Pseudojuloides splendens, ranging from Japan to Australia and across most of the South Pacific; a new species Pseudojuloides polynesica, from French Polynesia and the Line Islands; and Pseudojuloides pyrius Randall & Randall, 1981, endemic to the Marquesas Islands. The mtDNA lineages of the complex diverge from 3.5-11.3% in the sequence of the mtDNA-barcode marker COI. The species illustrate some of the more interesting phenomena in the evolution of species complexes among coral reef fishes: the species differences are mainly in male-display color patterns, the degree of phenotypic divergence does not correlate with the amount of genetic divergence (the most different-appearing species is one of the least divergent), and a corollary that the various genetic lineages must be distinguished to avoid paraphyly in the taxonomic construct of the species complex. A neighbor-joining tree and genetic distance matrix are presented for the seven species of the P. cerasinus species complex.

dct:issued

2017-01-01

dct:bibliographicCitation

Victor, B. 2017. Review of the Indo-Pacific <em>Pseudojuloides cerasinus</em> species complex with a description of two new species (Teleostei: Labridae). <em>Journal of the Ocean Science Foundation</em>, 29: 11-31.

bibo:doi

10.5281/zenodo.1068462

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n4:C1723161-A677-4087-A763-6D2805DA2922

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n10:P356

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10.5281/zenodo.1068462

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n10:P2007

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urn:lsid:zoobank.org:pub:C1723161-A677-4087-A763-6D2805DA2922