Schematic phylogenetic tree of mtDNA haplogroup H1. Only the Ashkenazi lineages are shown in full detail; the distribution of other lineages is indicated using small squares by the number present in the full tree for each subclade. Prehistoric European (all Neolithic, except for the H1aw lineage, which dates to the Iron Age) lineages are shown using red circles.
Marta D. Costa,	Joana B. Pereira,	Maria Pala,	Verónica Fernandes,	Anna Olivieri, Alessandro Achilli,	Ugo A. Perego,	Sergei Rychkov,	Oksana Naumova,	Jiři Hatina,	Scott R. Woodward,	Ken Khong Eng,	Vincent Macaulay,	Martin Carr,	Pedro Soares,	Luísa Pereira	&amp; Martin B. Richards
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Marta D. Costa et al. A substantial prehistoric European ancestry amongst Ashkenazi maternal lineages. Nature Communications 4, Article number: 2543 doi:10.1038/ncomms3543 <a rel="nofollow" class="external free" href="http://www.nature.com/ncomms/2013/131008/ncomms3543/full/ncomms3543.html">http://www.nature.com/ncomms/2013/131008/ncomms3543/full/ncomms3543.html</a>