Abstract
A survey of bothriocephalidean tapeworms (Cestoda) parasitizing African freshwater fish is provided. Based on criticalevaluation of type specimens and extensive, newly collected material, only the following seven species, instead of 19 taxalisted in the literature, are considered to be valid and their redescriptions are provided: Bothriocephalus acheilognathiYamaguti, 1934 (with 3 synonyms from Africa); Bothriocephalus claviceps (Goeze, 1782) (marginally in Africa);Ichthybothrium ichthybori Khalil, 1971; Kirstenella gordoni (Woodland, 1937) n. comb. (1 synonym); Polyonchobothriumpolypteri (Leydig, 1853) (4 synonyms); and Tetracampos ciliotheca Wedl, 1861 (4 synonyms). In addition, Tetracamposmartinae Kuchta n. sp. is proposed for tapeworms from the catfish Bagrus meridionalis from Lake Malawi. The new speciesdiffers from T. ciliotheca in a much larger body (19 cm versus 3 cm), dorsoventally flattened strobila and numerous (39 versus25–35) and longer apical hooks (up to 98 µm versus less than 50 µm). Kirstenella Kuchta n. gen. is proposed to accommodateSenga gordoni Woodland, 1937 as its type species. The new genus is distinguished from other genera of the Bothriocephalidaeby the presence of an apical disc armed with two lateral semicircles of large hooks, cortical vitelline follicles and large-sizedcirrus-sac. All but one valid species were recollected. Bothriocephalidean cestodes are widely distributed throughout Africa,but only two species, B. acheilognathi and T. ciliotheca, occur in other continents. All but one species (B. acheilognathi)exhibit narrow host specificity, being limited either to one host species (K. gordoni in Heterobranchus bidorsalis and T.martinae in Bagrus meridionalis) or one host genus (I. ichthybori in Ichthyborus spp., P. polypteri in Polypterus spp. and T.ciliotheca in Clarias spp.). Molecular data based on partial sequences of the large subunit rDNA (lsrDNA) show monophyletic position of all African taxa analysed (B. acheilognathi, I. ichthybori, K. gordoni, P. polypteri and T. ciliotheca).References
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