Boomker & Petter 1993. Parasites of South african freshwater fish. 3. Rhabdochona (Rhabdochona) versterae n. sp. (Nematoda: Rhabdochonidae) from the spot-tailed robber, Alestes imberi Peters 1852. Onderstepoort Journal of Veterinary Research, 60(1), March 1993: 23-27