Fig. 13From: Quadriacanthus species (Monogenea: Dactylogyridae) from catfishes (Teleostei: Siluriformes) in eastern Africa: new species, new records and first insights into interspecific genetic relationshipsMale copulatory organ of seven representative species of Quadriacanthus (characters of interest indicated by arrows). a Q. mandibulatus n. sp. b Q. aegypticus. c Q. bagrae. d Q. clariadis. e Q. fornicatus n. sp. f Q. pravus n. sp. g Q. zuheiri n. sp. Back to article page