Krystal A. Tolley is Principal Scientist, Molecular Ecology Program in Applied Biodiversity Research of the South African National Biodiversity Institute. Her research focuses on understanding the historical processes that generate patterns of diversity and lead to species radiations of reptiles and amphibians in southern Africa. Anthony Herrel is a permanent researcher at the Centre Nationale de la Recherche Scientifique (CNRS) and the head of the Function and Evolution team of the Unite Mixed de Recherche (UMR) 7179, based at the Museum national d'Histoire naturelle in Paris.