Figure 6

Timetree of Aciliini. Time-calibrated Bayesian phylogeny obtained with BEAST based on the fossil Acilius florissantensis used as a crown-node constraint on the genus Acilius. Horizontal bars at the nodes indicate 95% highest posterior density intervals for the age of the corresponding node. Maps (a-c) at scale bar represent the position of continents at the time (modified from [61]), colored following hypothetical ancestral distributions of the clades obtained from RASP. Map (a): ancestral distribution of Thermonectus in South America and of Tikoloshanes + Aethionectes in Africa. Map (b): ancestral distribution of Graphoderus + Acilius in Euramerica and of Sandracottus + Rhantaticus in Asiamerica appears. Map (c): current distribution of genera (Tikoloshanes, Aethionectes and Rhantaticus overlap in Africa).