Elevation map of the southern part of the Gregory Rift with the collection sites of Udea kirinyaga (red dot) at Mount Kenya, and U. meruensis (green triangle) as well as U. nicholsae and U. momella (yellow square; same collection site) at Mount Meru; the “?” represents the collection site of a DNA-barcoded specimen that might represent an additional species (see section “Genetic data” under U. ferrugalis); elevations ≥ 500 m are marked in increasingly darker grey shades every 500 m.