Fig. 11From: 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 aegypticus (a, b), Q. bagrae (c, d), Q. clariadis (e, f). Scale-bars: a, c, e, 30 μm; b, d, f, 20 μmBack to article page