THE GENUS ARGULUS (CRUSTACEA, BRANCHIURA) IN AFRICA - 2 NEW SPECIES, A-FRYERI AND A-GRACILIS, THE PREVIOUSLY UNDESCRIBED MALE OF A-BRACHYPELTIS FRYER AND THE IDENTITY OF THE MALE DESCRIBED AS A-AMBLOPLITES WILSON

Two new species of Argulus Muller, 1785 (Crustacea: Branchiura) are de scribed from Africa. A. fryeri n. sp., parasitic on an unknown fish sp ecies collected from Lake Turkana, Kenya, is characterised by: deep an tero-lateral depressions which delimit a pronounced frontal region; ro bust, square second maxillae ornamented with numerous small, simple sc ales; and the shape of the respiratory areas. The most distinctive fea tures of A. gracilis n. sp., parasitic on Auchenoglanis occidentalis v ar, tanganicanus collected from Lake Tanganyika, are the anterior spin es on the first antennae and the shape of the respiratory areas. A, br achypeltis Fryer, previously known only from the female, is characteri sed by: a narrow, elongate body with foreshortened carapace lobes; sma ll, slender terminal spines on the first antennae; and short terminal segments on the second maxillae with minute claws. The identity of the male described as A. ambloplites Wilson is discussed and renamed A, c onfusus nom. nov.