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Evolution

Speciation in the round

'Ring species' occur when one species grades into two at the overlap of a circular population distribution. Good examples are rare, but one case has now passed some rigorous tests.

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Figure 1

DARREN IRWIN

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Correspondence to David B. Wake.

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Wake, D. Speciation in the round. Nature 409, 299–300 (2001). https://doi.org/10.1038/35053264

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