Fig. 2

Phylogenetic representation of the 80 genomes used and their genomic composition. (a) Phylogenetic tree, in which monophyletic groups with six or more species are indicated by colored branches and identified with a shape (Plants = green, Arthropods = orange, Fishes = blue, Amphibians = pink, Mammals = brown and Birds = violet). The species names are highlighted with background color according to the three Supergroups considered (Plants = green, Protostomes = orange, Deuterostomes = purple). Species names in bold indicate genomes with annotation information. Pie diagrams indicate the GC content of each species (GC = Light gray, AT = Dark gray), and bars their genome sizes. (b) Percentage of intergenic, intronic and exonic regions related to genome size for the 44 species with annotated genomes grouped by supergroup (Data S1)