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. 2009 May 7;9:92. doi: 10.1186/1471-2148-9-92

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Copyright © 2009 Wahlberg et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Species through time, a summary of our results. Species below the "grey zone" are clear independent lineages with no known closely related sister species. Species in the "grey zone" are at various stages in the speciation process. Species above the "grey zone" are closely related sister species that are separate genetic entities. They have thus by this time also become clear independent lineages ready for a future new bifurcation, should the right circumstances arise. Figure modified from de Queiroz [58].