title: Description of the previously unknown male of Argulus kosus Avenant-Oldewage, 1994 (Crustacea : Branchiura).
abstract: Argulus kosus Avenant-Oldewage, 1994 was described from two females collected in Kosi Bay, South Africa. Individuals of both sexes have now been found associated with freshwater, estuarine and marine fishes in Lake St Lucia on the coast of northern KwaZulu/Natal. The male is described, and A. smalei Avenant-Oldewage & Oldewage, 1995 is synonymised with A. kosus.
authors.affiliation: Department of Zoology and Entomology, University of the Orange Free State, Bloemfontein, South Africa.
authors.forename: J G
authors.initials: JG
authors.lastname: Van As
authors.forename: J P
authors.initials: JP
authors.lastname: Van Niekerk
authors.forename: P A
authors.initials: PA
authors.lastname: Olivier
mesh_terms: D000818:Animals; D003445:Crustacea / Q000033:anatomy & histology / Q000145:classification*; D004478:Ectoparasitic Infestations / Q000469:parasitology / Q000662:veterinary*; D005260:Female; D005393:Fish Diseases / Q000469:parasitology*; D005399:Fishes; D008297:Male; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D013019:South Africa