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 ), 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 ); different colors refer to distinct plant associations.
Pereira et al. BMC Evolutionary Biology 2011 11:194 doi:10.1186/1471-2148-11-194