Infection of Tomicus piniperda (Col., Scolytidae) with Canningia tomici sp. n. (Microsporidia, Unikaryonidae)

Authors

  • B. Kohlmayr,

    1. Institute of Forest Entomology, Forest Pathology and Forest Protection, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Austria;
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  • J. Weiser,

    1. Insect Pathology, Institute of Entomology, Academy of Sciences of the Czech Republic, Ceske Budejovice, Czech Republic;
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  • R. Wegensteiner,

    1. Institute of Forest Entomology, Forest Pathology and Forest Protection, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Austria;
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  • U. Händel,

    1. Institute of Forest Entomology, Forest Pathology and Forest Protection, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Austria;
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  • Z. Zizka

    1. Electron Microscopy, Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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Abstract

Canningia tomici sp. n. (Microsporidia, Unikaryonidae) infects the midgut epithelium, the gut muscules, Malpighian tubules, connective tissues, adipose tissues and the gonads of the pine shoot beetle, Tomicus piniperda (L.) (Coleoptera, Scolytidae). The infection is present in populations of Tomicus piniperda in Europe and in the United States. Uninucleate oval single spores occur in two sizes: 2.8 ± 0.4 × 1.4 ± 0.4 μm and 3.8 ± 0.3 × 2.0 ± 0.2 μm. The polar filament of this microsporidium is fixed subapically in a flat anchoring disc. The thick posterior lamellae of the binary polaroplast are asymmetric due to the lateral fixation of the polar filament.

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