CANNINGIA SPINIDENTIS GEN ET SP-N (PROTISTA, MICROSPORA), A NEW PATHOGEN OF THE FIR BARK BEETLE PITYOKTEINES SPINIDENS

Canningia spinidentis gen. et sp, n. infects the fir bark beetle Pityo kteines spinidens Rtt. in Austria. The pathogen attacks mainly the fat body, Malpighian tubules, the muscles and the connective tissue of la rvae and adults, and the gonads of adults. The development is haplokar yotic, with single spores. Spores are short tubular, uninucleate, with globular anchoring disc inserted subapically, laterally, in a depress ion of the endospore wall. Polar filament is isofilar, with 5/6 coils. Polaroplast is composed of two lamellar parts of different density. A new genus Canningia gen. n. is proposed based on differences in ultra structures of spores from Unikaryon Canning, Barker, Hammond et Nichol as, 1974.