Species of the genera Oxydirus, Dorylaimellus (Axodorylaimellus), Laimydorus and Rhabdolaimus from rivers in the Kruger National Park (Nematoda: Dorylaimida and Araeolaimida)

Descriptions are given oi'0.\'vdirusgangeticusS\c\dic\i, 1966, Laimydorus africanus spec. nov. and Rhaljclolainms terrestris De Man, 1880, recorded for the first time from South Africa. New distribution records are given for Dorylaimellus {Axodorylaimellus) caffrae (Kruger, 1965). Additional information is given and morphometric data are tabulated and where appropriate, illustrations are also given.