Hydrobiological Journal

ISSN for PRINT: 0018-8166

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2002, Volume38

Issue 4

164 pages

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P. Ya. Kiloczyckij
T. Shevchenko Kiev University Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine

N. A. Ovcharenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine

O. V. Polkovenko
T. Shevchenko Kiev University Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine

L. V. Shostak
T. Shevchenko Kiev University Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine

Four species of Microsporidia parasitizing Branchiopod hosts are described based on the light and ultrastructural data. Microsporidium sp. from the body cavity of Lepidurus apus, produced ovoid spores 3.5±0.4ґ2.2±0.3 mm in size. Mononuclear (asymmetrical spores of Larssonia hiberna sp. n., measured 3.8±0.1x2.0±0.2 mm, were found in fat tissues and hemocoel of Daphnia magna. Filamentous episporal surfacing inverted polaroplast and 8-9 coiled isofilar polar filament are characteristic features of this species. Berwaldia singularis Larsson and Microsporidium stagnalis sp. n. from D. pulex are presented. Ellipsoidal spores of M. stagnalis, 4.8±0.4ґ2.4±0.3 mm in sizes, formed a two-layered exospore, tripartite lamellar and tubular polaroplast, and the isofilar polar filament coiled in a two-layer spiral of 14 rings.

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