Figure 1

Divergence processes in the ring species Ensatina eschscholtzii. a) Ecomorphotypes in Ensatina defined by color pattern. b) Nei's (1972) genetic distances based in 26 allozyme loci (adapted from [34]), showing increased differentiation towards the terminus of the ring (red) and lower genetic divergence between populations around the ring (black). c) Floristic provinces of California (adapted from [30]); different colors refer to distinct plant associations.