Abstract
Fifteen species of dactylogyrid monogeneans, belong to Dactylogyrus and Dogielius were observed in seven different African species of Barbus and Varicorhinus (Teleostei, Cyprinidae). The barbels examined in West Africa were: Barbus occidentalis Boulenger, 1911, known in the large Sahel-Sudan rivers and in Gabon: B. waldroni Nordman, 1935, B. petitjeani Daget, 1962, B. sacratus Daget, 1963, B. parawaldroni Leveque, Thys van den Audenaerde & Traore, 1987 and Varicorhinus wurtzi (Pellegrin, 1908) are distributed in various coastal rivers in the Gulf of Guinea. B. bynni (Forskal, 1775) the seventh species, is found in East Africa where it is known in the Nile Basin and the lakes connected with it. Three previously reported monogeneans were found: Dactylogyrus pseudanchoratus Price & Gery, 1968, was identified on all the host species studied; D. falcilocus Guegan, Lambert & Euzet, 1988, was found on V. wurtzi from Little Scarcies in Guinea; D. ruahae Paperna, 1973, was found on B. sacratus, B. parawaldroni and V. wurtzi in the rivers flowing from the Fouta Djalon mountains in Guinea to the Atlantic.
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