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A tri-oceanic perspective: DNA barcoding reveals geographic structure and cryptic diversity in Canadian polychaetes.

Christina M CM Carr, Sarah M SM Hardy, Tanya M TM Brown, Tara A TA Macdonald, and Paul D N PD Hebert

PLoS One 6(7):e22232 (2011) PMID 21829451 PMCID PMC3136506

Although polychaetes are one of the dominant taxa in marine communities, their distributions and taxonomic diversity are poorly understood. Recent studies have shown that many species thought to have broad distributions are actually a complex of allied species. In Canada, 12% of polychaete species are thought to occur in Atlantic, Arctic, and Pacific Oceans, but the extent of gene flow among their populations has not been tested.

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