Phylogenomics reveals rapid, simultaneous diversification of three major clades of Gondwanan frogs at the Cretaceous–Paleogene boundary

Significance Frogs are the dominant component of semiaquatic vertebrate faunas. How frogs originated and diversified has long attracted the attention of evolutionary biologists. Here, we recover their evolutionary history by extensive sampling of genes and species and present a hypothesis for frog evolution. In contrast to prior conclusions that the major frog clades were established in the Mesozoic, we find that ∼88% of living frogs originated...