Chasmatosuchinae contains many Triassic proterosuchids in addition to the only Permian proterosuchid, Archosaurus; this would suggest that an initial taxonomic diversification of the Proterosuchidae (including an initial taxonomic divergence between Proterosuchus and chasmatosuchines) had already occurred in the Permian.
Chasmatosuchinae includes numerous Triassic proterosuchids alongside the sole Permian proterosuchid, Archosaurus; this implies that an initial taxonomic diversification of Proterosuchidae (including an initial taxonomic separation between Proterosuchus and chasmatosuchines) had already taken place in the Permian.