Monogeneans of the genus Cichlidogyrus Paperna, 1960 (Dactylogyridae: Ancyrocephalinae) from cichlid fishes of Lake Kariba (Zimbabwe) with descriptions of five new species

The gills of six species of cichlid present in Lake Kariba (Zimbabwe) revealed the presence of twelve species of Cichlidogyrus, five being new species. The parasites were as follows: C. halli (Price & Kirk, 1967) in Oreochromis mortimeri (main host) and Serranochromis macrocephalus (occasional host); C. tilapiae Paperna, 1960 and C. longicornis Paperna & Thurston, 1969 in O. mortimeri only; C. sclerosus Paperna & Thurston, 1969 in O. mortimeri (main host) and in S. macrocephalus (occasional host); C. haplochromii Paperna & Thurston, 1969 in Pharyngochromis darlingi only; C. tiberianus Paperna, 1960 in Tilapia rendalli only; C. dossoui n. sp. in T. rendalli (type-host) and in O. mortimeri and S. macrocephalus (occasional hosts); C. karibae n. sp. in S. codringtonii (type-host) and in O. mortimeri (occasional host); C. zambezensis n. sp. in S. macrocephalus (type-host) and in O. mortimeri (occasional host); C. quaestio n. sp. in T. rendalli (type-host) and in S. codringtonii and S. macrocephalus (occasional hosts); C. philander n. sp. in Pseudocrenilabrus philander. C. longicornis gravivaginus Paperna & Thurston, 1969, found in O. mortimeri, is elevated to specific status. Descriptions, measurements and drawings of the sclerotised parts are given for each species and compared with data in the literature. A key for the identification of the Cichlidogyrus species present in Lake Kariba is proposed. © 1993 Kluwer Academic Publishers.