Figure 6.

Hypothetical distribution of the Ensatina complex ≈5 million years before present. Based on reconstruction of California paleogeography by Yanev (27). Approximate location of precursors to genetically defined units within the Ensatina complex are indicated. oreg-picta, oregonensis and picta; plat 1, northern platensis (15, 17); plat 2-croc-klau, southern platensis plus croceater plus klauberi (15, 17); xanth, xanthoptica; esch, eschscholtzii; SF, approximate position of present day San Francisco; SD, approximate position of present-day San Diego. The approximate positions of the San Andreas Fault and Monterey Canyon (the latter at the outflow of the Pajaro and Salinas Rivers) are indicated.