Fig. 12From: Quadriacanthus species (Monogenea: Dactylogyridae) from catfishes (Teleostei: Siluriformes) in eastern Africa: new species, new records and first insights into interspecific genetic relationshipsPhase-contrast photomicrographs of the sclerotized haptoral structures and male copulatory organ of Quadriacanthus fornicatus n. sp. (a, b), Q. pravus n. sp. (c, d), Q. zuheiri n. sp. (e, f). Scale-bars: a, c, e, 30 μm; b, d, f, 20 μmBack to article page