11- Aphyosemion bualanum : this question was raised after Seegers's publication [1988d. Bemerkungen über die Sammlung der Cyprinodontiformes (Pisces: Teleosta) des Zoologischen Museums Berlin. 1. Die Gattungen Aphyosemion Myers, 1924 und Fundulosoma Ahl, 1924. Teil 2. Mitt. Zool. Mus. Berlin, 64 (1): 3-70, figs.] and Huber's reaction [1998: Miscellaneous Notes on some Systematic Difficulties Regarding old World Cyprinodonts. J. Amer. Killifish Assoc., 31 (1): 3-17, 28-32] ; after the study of the same single type of bualanum, Seegers believes that it belongs to an unknown Mesoaphyosemion sp. (e.g. like cameronense or wildekampi) and Huber is cautious and does not find morphological differences with what was understood as bualanum since Scheel (a fasciated fish) ; no solution from the renewed study of the single type : it has been smashed for unknown reasons ; to solve that issue, only successful collections around Bouala {6.417N;15.583E}, in Central African Republic, are required, but this is a challenge : a remote place in highlands (1200 m altitude) with no primary forest