Figure 4From: Evolutionary history of the iroquois/Irx genes in metazoansPhylogenetic analysis of Irx genes in protostomes. The represented tree is a maximum-likelihood tree, which has been rooted using the Irx gene from Nematostella as outgroup (this should be considered as arbitrary rooting). The most important monophyletic groups are indicated in red and the associated numbers are their statistical support values obtained with different methods of phylogenetic reconstruction, as described in Figure 2. Statistical support in the maximum-likelihood analysis for some other internal branches is indicated in black.Back to article page