FIGURE 1.
Locations of major rivers and hypothesized refugia (labeled 1–10) in West and Central Africa, adapted from Maley (1996)
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.