South-western extension of the known range of two freshwater shrimps, Caridina nilotica (Roux) and Macrobrachium petersi (Hilgendorf), in South Africa

Abstract

Two freshwater shrimps, Caridina nilotica (Roux) and Macrobrachium petersi (Hilgendorf), were collected in the Gamtoos River in the eastern Cape, representing a southwestern range extension for both. This is the first known record of these species west of Port Elizabeth, and also the first record of an overlap of their distribution ranges with that of the Cape river shrimp, Palaemon capensis (de Man).