Abstract
In this study, we examined myxozoan infections of Labeobarbus batesii sampled from the Makombè River in Cameroon. Fish were infected with Myxobolus makombensis n. sp. in the gill filament and M. dibombensis in the fins. Mature myxospores of M. makombensis n. sp. are pyriform in frontal view and biconvex in lateral view, with a truncated and slightly narrow anterior end. Spore dimensions (mean ± SD, with range in parentheses) are 17.5 ± 0.22 (16.2-18.9) μm length, 13.4 ± 0.25 (12-14.9) μm width, and 7 ± 0.21 (6.7-7.5) μm thickness, and spores exhibit a conspicuous anterior intercapsular appendix of 4.4 ± 0.18 (3.9-5.5) µm length. Myxospores have 2 pyriform polar capsules of unequal size; the larger one is 9.8 ± 0. 22 (8.2-10.9) μm long × 4.7 ± 0.15 (3.5-5.2) µm wide, and the smaller one is 8.8 ± 0.22 (7-10) µm long × 4.3 ± 0.12 (3.5-5.2) µm wide. Polar filaments possess 10 to 11 coils in the large polar capsule and 8 to 10 coils in the small polar capsule. Phylogenetic analysis of SSU rDNA sequences showed clustering of M. makombensis n. sp. close to M. dibombensis recently reported from the fins of the same host within a clade composed exclusively of parasites infecting cyprinid fishes.
Published Version
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