Light and scanning electron microscopy of Chloromyxum vanasi sp. n. (Myxozoa: Myxosporea) infecting gallbladder of the Nile catfish Bagrus bayad (Forskal, 1775) (Teleosti: Bagridae)

Abstract

Light and SEM description of a new myxosporean species Chloromyxum vanasi which infected the gallbladder of the Nile catfish Bagrus bayad (Forskal, 1775) are presented. The host fishes were examined from two localities in Egypt, Nile River and Wadi El-Raiyan Lake. Prevalence of infection was very low but the infection was severe when found. Pseudoplasmodia are polysporic, rarely disporic, round to ellipsoid with holdfast projections and pseudopodia. Spores are subspherical with 2 supracapsular loops, 2-3 extrasutural ridges. Some spores contained a transverse furrow at the surface of the posterior third of the shell. Polar filament pores are very conspicuous and arranged in zig-zag position. Dissimilar arrangement of shell ridges was evident and asymmetrical shell valves were observed.

Publication Title

Acta Protozoologica

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