Abstract
The results of a systematic survey of monogeneans collected from the gills of the African carp, Labeo coubie (Cyprinidae) from the Gambia River basins in the Niokolo-Koba National Park, Senegal, are presented. The following 11 previously described species belonging to Dactylogyrus and Dogielius (Dactylogyridae) are reported: Dactylogyrus retroversus Guégan, Lambert & Euzet, 1988, Dactylogyrus titus Guégan, Lambert & Euzet, 1988, Dactylogyrus falcilocus Guégan, Lambert & Euzet, 1988, Dactylogyrus decaspirus Guégan, Lambert & Euzet, 1988, Dactylogyrus oligospirophallus Paperna, 1973, Dactylogyrus jaculus Guégan, Lambert & Euzet, 1988, Dogielius anthocolpos Guégan, Lambert & Euzet, 1989, Dogielius clavipenis Guégan, Lambert & Euzet, 1989, Dogielius harpagatus Guégan, Lambert & Euzet, 1989, Dogielius complicitus Guégan, Lambert & Euzet, 1989, and Dogielius flagellatus Guégan, Lambert & Euzet, 1989. Three new species of Dactylogyrus with 2 haptoral bars are described as follows: Dactylogyrus yassensis n. sp., Dactylogyrus dembae n. sp., and Dactylogyrus leonis n. sp. The sclerotized structures of type and voucher specimens of Dactylogyrus cyclocirrus Paperna, 1973, Dactylogyrus omega Guégan & Lambert, 1991, and Dactylogyrus cf labeous Paperna, 1979 are illustrated for comparative purposes. The type specimens indicate that D. cyclocirrus is based on specimens of two different species, among which the lectotype is designated from the syntypes collected from Labeo cylindricus. Dactylogyrus cyclocirrus of Guégan et al. (1988) and D. cf labeous Paperna, 1979 are considered senior subjective synonyms of D. yassensis n. sp. and D. dembae n. sp., respectively.References
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