Time-calibrated phylogenetic tree of Pospiviroidae. A–E Calibration points (see Material and Methods). Viroids typically infecting plants native to South America are marked in red.

 
 
  Part of: Bajdek P (2019) Divergence rates of subviral pathogens of angiosperms abruptly decreased at the Cretaceous-Paleogene boundary. Rethinking Ecology 4: 89-101. https://doi.org/10.3897/rethinkingecology.4.33014