Fig. 1From: New data from basal Australian songbird lineages show that complex structure of MHC class II β genes has early evolutionary origins within passerinesRelationships among major passerine families. Grey shading indicates families included in this study and asterisks denote families in the Corvida that have been previously studied. Phylogeny constructed using the Ericson backbone in birdtree.org [72] and rooted with Gallus gallus Back to article page