Africa: rivers in Senegal, Gambia, Guinea, Sierra Leone, Liberia, Mali, Burkina Faso, Côte d'Ivoire, Ghana, Niger, Nigeria, Cameroon and Chad (Ref. 57259), Benin and Togo (Ref. 27139); also river drainages in Central African Republic (Ref. 3788) and White Nile in Sudan (Ref. 3788, 7372).