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. 2008 Sep 4;363(1508):3319–3334. doi: 10.1098/rstb.2008.0114

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© 2008 The Royal Society

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(a) Map of the Chatham Islands with the distribution of two species of the cave weta (cricket) genus Talitropsis on the archipelago. The broken line indicates the inferred land area above sea level during the Last Glacial Maximum. (b) The phylogeny of Talitropsis in New Zealand and the Chatham Islands, highlighting the haplotype diversity on the geologically young Chatham Islands (max. 4 Ma; Campbell et al. 2006). Low levels of variation in mitochondrial COI data between New Zealand and Chatham species and within the Chatham Islands (J. Goldberg 2007, unpublished data) corroborate earlier results for Talitropsis (Trewick 2000a) and emphasize that speciation can be rapid even in a small, young landscape.