Additional file 8.
Phylogenetic tree of BEL/Pao elements with species names. The Figure shows the same tree as in Figure 4 in the main text but with the species names shown in which the elements occur. If a clade of elements contained only element families from the same species or from very closely related species (e. g. mosquito species), the clade was collapsed to reduce the size of the tree. All species names are shown at the leaves of the tree. If all species in one clade of the tree belonged to the same genus, such as the genus Drosophila, only the genus name is shown, with the number of species in brackets. Major clades are highlighted in different colors.
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de la Chaux and Wagner BMC Evolutionary Biology 2011 11:154 doi:10.1186/1471-2148-11-154