Abstract

SYNOPSIS. Lymphotropha tribolii gen. nov., sp. nov. (Neogregarinida, Schizocystidae) is described from the haemocoele of Tribolium castaneum (Herbst) (Coleoptera, Tenebrionidae). The trophozoites are large, ovoid and uninucleate with distinct longitudinal striae. Schizogony occurs in one type of cycle only, each schizont giving rise to up to 8 merozoites. Gametocytes are uninucleate when they associate. Up to 16 oocysts each with 8 sporozoites are formed in each gametocyst. The oocysts are lemon‐shaped, and sporozoites emerge from the poles.The parasite causes considerable mortality in young larvae, though its pathogenicity is probably inferior to that of Farinocystis tribolii Weiser.

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