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  • Title: Nematodes from the squeaker fishes Synodontis nigromaculatus and S. vanderwaali from the Okavango River, Botswana, including three new species.
    Author: Moravec F, Van As JG.
    Journal: Syst Parasitol; 2004 Nov; 59(3):169-87. PubMed ID: 15542947.
    Abstract:
    Five nematode species were recorded from the stomach and rectum of the spotted squeaker Synodontis nigromaculatus Boulenger or the finetooth squeaker S. vanderwaali Skelton & White (Mochokidae, Siluriformes) from the Okavango River, Botswana: Falcaustra similis n. sp. (Kathlaniidae), Labeonema africanum n. sp. (Cosmocercidae), Synodontisia okavangoensis n. sp. (Pharyngodonidae), Procamallanus ( Procamallanus ) laeviconchus (Wedl, 1861) (Camallanidae) and Spinitectus sp. (Cystidicolidae) (only a single female). F. similis (type-host Synodontis nigromaculatus ) differs from the similar species F. straeleni Campana-Rouget, 1961 mainly by the number and disposition of the male caudal papillae and the structure of the mouth; L. africanum (type-host S. nigromaculatus ) differs from its congeners in having distinctly longer spicules (105-120 microm), a relatively shorter gubernaculum (30-36 microm) and in the number and arrangement of the male caudal papillae; Synodontisia okavangoensis (type-host Synodontis nigromaculatus ) is characterised principally by crescent-shaped cephalic papillae, length (87 microm) and shape of the spicule as well as large eggs (0.156-0.180x69-102 microm). Synodontisia moraveci Anderson & Lim, 1996 is transferred to a newly established genus, Royandersonia n. g., (as its type-species) as R. moraveci (Anderson & Lim, 1996) n. comb. Some taxonomic problems concerning Procamallanus ( P .) laeviconchus are discussed. All species were studied by scanning electron microscopy for the first time.
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