Being in the right place at the right time? Parallel diversification bursts favored by the persistence of ancient epizoochorous traits and hidden factors in Cynoglossoideae.

One more example of "biogeographic congruence" in angiosperms is supported by a shared geographic (central-northeastern Palearctic) and temporal (28.60-21.59 mya, late Oligocene) opportunity window for two main clades' diversification. Epizoochorous traits (fruit glochids) had an effect in higher diversification rates only with the joint effect of other unmeasured factors.