Rediscovery of Chonopeltis meridionalis Fryer, 1964 (Crustacea: Branchiura) from Labeo rosae Steindachner in the River Olifants, Mpumalanga, and the taxonomic status of C. victori Avenant-Oldewage, 1991 and C. koki Van As, 1992.

Chonopeltis Thiele, 1900 presently comprises 14 species, it is endemic to Africa and its species show a high degree of host-specificity towards fish families and in some cases, individual fish species. Chonopeltis meridionalis Fryer, 1964 was originally described from Labeo rosae Steindachner collected in the River Nuanetsi in Rhodesia, now Zimbabwe, Limpopo River System. At the time of description C. meridionalis was the most southerly species of the genus. Chonopeltis victori Avenant-Oldewage, 1991 was described from the River Olifants, Mpumalanga, South Africa, which also forms part of the Limpopo River System. The host fish was Labeo rosae and Labeobarbus marequensis (A. Smith), whilst C. koki Van As, 1992 was described from Labeo cylindricus Peters, collected in the River Zambezi, Eastern Caprivi, Namibia. During surveys conducted in 2012, additional material of a species of Chonopeltis was collected from Labeo rosae in the River Olifants. Upon closer examination, the new material was identified as C. meridionalis. Further investigation revealed that C. victori and C. koki share a number of characteristics with C. meridionalis. This paper provides the first scanning electron microscopy of C. meridionalis, includes additional information on fully-mature as well as sub-adult males and females. Finally, it was concluded that C. victori and C. koki are junior synonyms of C. meridionalis.