Fig. 2

Phylogenetic tree of C. megacephala and other species (A. grahami, S. peregrina, S. bullata, P. regina, M. domestica, L. sericata, L. cuprina, C. vicina, C. rufifacies, D. melanogaster) based on the analysis of contracted and expanded gene families. The number near each branch indicates the number of significantly expanded (green) and contracted (red) gene families for each clade. The black numbers show the divergence times. Blue: the number of gene families unchanged in size across all branching gene families. Orange: the number of gene families changed in any branch gene family