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. 2013 Mar 19;13:67. doi: 10.1186/1471-2148-13-67

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Copyright © 2013 Laakkonen 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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Comparison of mitochondrial haplotype networks of trans-Arctic clades for three zoogeographically analogous amphi-boreal taxa. (a) 99% statistical parsimony network of the trans-Arctic Clupea pallasii lineage (cyt-b data only). (b) Median-joining network of Mytilus trossulus (control region; redrawn from [6]).The branch lengths correspond to the number of substitutions but unobserved haplotypes are not marked here (c) 99% statistical parsimony network of Macoma balthica (COIII gene; [5]). Note the similar trans-Arctic distributions and signatures of expansion in the dominant Atlantic haplotypes.