Fig. 1. Phylogeny of Archosauria (see text for references), with key nodes connecting the lineages of 13 modeled taxa to the ancestral conditions estimated in this study.

Branch lengths (to modeled taxa; and between nodes) and divergence times (at nodes with clade names) are shown. Mean (or measured, for extant taxa) body masses of modeled taxa are in parentheses with branch lengths. Ma, million years.