The distribution of Chromaphyosemion Radda, 1971 (Teleostei: Cyprinodontiformes) on the coastal plains of West and Central Africa
Author
Rainer SONNENBERG
Abstract:
The species of the monophyletic genus Chromaphyosemion Radda. 1971live in small streams and rivulets (‘marigots’) in the coastal plains from Togo to Gabon. In their distribution area. some glacial forest refuges are postulated, mainly in Cameroon. Equatorial Guinea and Gabon. It is assumed that evolution and biogeography of this genus is connected with the evolution of the Central African rainforest during the Quaternary. In this paper Chromaphyosemion is grouped into 16 forms, defined by their colour patterns. The distribution data show that the maximum diversity of this genus is found in the proposed glacial rainforest refuges of Cameroon, suggesting a structurally complex history of these old rainforest blocks. Key Words: Aplocheilidae, Chromaphyosemion biogeography, rainforest refuges
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