Fig. 2

a Cladogram representing the relationship between the four principal clades of the Nothobranchius genus. Each clade is indicated with a different color. b Geographic map of Africa, the distribution of the four clades represented in the phylogenetic tree of panel A (modified from [9]) are indicated in the different colors. Note the almost complete lack of overlap between the ranges of the different clades. c Cladogram representing the relationship between the Nothobranchius species of the Southern clade whose lifespan characteristics are reported in Ref. [47] (top), and the relationship between the three geographic clades of Nothobranchius furzeri described in Ref. [8] (bottom). d Geographic map showing the distribution of the three Nothobranchius species described in the phylogenetic tree (c top), indicated as red points, and the distribution of the Nothobranchius furzeri populations described in (c bottom), indicated by black dots and specific sampling codes. The three colored ellipses identify the approximate range of the N. furzeri populations described in (c) overlaid onto the precipitation gradient (modified from [47])