FIGURE 4 in Phylogeny and classification of the New World suboscines (Aves, Passeriformes)

FIGURE 4. simplified chronogram from the BEAST analyses, illustrating the crown age and number of extant species for most clades recognized as family level taxa in our proposed classification. Unresolved nodes are collapsed and species richness of each terminal clade is illustrated by its height. Clades are coloured in accordance with their species number: black: ≤19 species; medium grey: 31–54 species, light grey:>75 species. Blue bars show the 95% confidence interval of the age estimates. The curve at the bottom of the chronogram is a simplified version of the δO18 curve of Zachos et al. (2001), serving as a proxy for global temperature.