Folia Parasitologica, vol. 61 (2014), issue 2

Folia Parasitologica 61[2] 157-172 (2014) | 10.14411/fp.2014.022

Rhabdochona spp. (Nematoda: Rhabdochonidae) from fishes in the Central African Republic, including three new species

František Moravec, Miloslav Jirků
Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, České Budějovice, Czech Republic

Based on light and scanning electron microscopical studies, three new, one already known and one not identified species of the nematode genus Rhabdochona Railliet, 1916 are reported from the intestine of freshwater fishes in Dzanga-Sangha Protected Areas (Congo River basin), the Central African Republic: Rhabdochona (Rhabdochona) centroafricana sp. n. from Barbus miolepis Boulenger, R. (R.) marcusenii sp. n. from Marcusenius greshoffii (Schilthuis), R. (Globochona) paski Baylis, 1928 from Phenacogrammus aurantiacus (Pellegrin) (new host record), R. (G.) tricuspidata sp. n. from Raiamas christyi (Boulenger) and Rhabdochona (G.) sp. (only females) from Epiplatys multifasciatus (Boulenger). Rhabdochona centroafricana is mainly characterised by the length of the left spicule (333 µm) and the presence of the operculum bearing a conspicuous gelatinous formation on one of egg poles, R. marcusenii by the length of the left spicule (453-486 µm) and the presence of a single broad filament on one egg pole only and R. tricuspidata by the body with marked cuticular ornamentations and deirids branching into three prongs. A key to valid species of Rhabdochona parasitic in fishes of Africa is provided.

Keywords: parasitic nematode, Globochona, freshwater fish, Barbus, Epiplatys, Marcusenius, Phenacogrammus, Raiamas, Congo River basin

Received: August 23, 2013; Accepted: November 21, 2013; Prepublished online: January 10, 2014; Published: April 14, 2014


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