The study of the gill parasites from Clarias ebriensis Pellegrin, 1920 (Siluriformes, Clariidae) from the river Agnéby (Côte-d’Ivoire) revealed two new monogeneans of the genus Quadriacanthus Paperna, 1961. In this paper, descriptions of Quadriacanthus eboreus n. sp. and Quadriacanthus ivoiriensis n. sp. are given. They can be distinguished from all other species of the genus by the morphology and the size of sclerotised part of the haptor and the structure of the genitalia. Q. eboreus n. sp. shows dorsal and ventral gripi wich are larger than those of Q. ivoiriensis n. sp. These two species can also be distinguished by the morphology of the penis and the accessory piece.
Platyhelminthes, Monogenea, Quadriacanthus, Siluriformes, Clarias ebriensis, Ivory Coast, West Africa, new species.