PARASITES OF SOUTH-AFRICAN FRESH-WATER FISH .5. DESCRIPTION OF 2 NEW SPECIES OF THE GENUS SPINITECTUS FOURMENT, 1883 (NEMATODA, CYSTIDICOLIDAE)

Spinitectus petterae n. sp. was recovered from catfish, Clarias gariep inus (Burchell, 1822) and Spinitectus zambezensis n. sp. from squeaker s, Synodontis zambezensis Peters, 1852 in the Kruger National Park. Th e nematodes are easily differentiated from each other in that Spinitec tus petterae has an additional pair of papillae on the pseudolabia, th e males have considerably longer spicules and a different configuratio n of the tips of the left spicule, and the vulva of the females is con siderably closer to the anus than is the case with Spinitectus zambeze nsis. The new species differ from Spinitectus allaeri Campana-Rouget, 1961, Spinitectus mormyri Campana-Rouget, 1961 and Spinitectus thursto nae Ogden, 1967 in having more spines per row in the 1 st 2 rows. Desp ite possible conspecificity with Spinitectus polli Campana-Rouget, 196 1, Spinitectus zambezensis should be regarded as a valid species becau se of the morphological, geographical and host differences.