Abstract
The paper treats the taxonomy of the genus Systenostrema Hazard & Oldacre, 1975, starting with an ultrastructural investigation of two new species, parasitic in larvae of the dragonflies Aeshna grandis and Libellula quadrimaculata, collected in Sweden. The two species are identical in pathology and presporal stages, but differ in the shape of spores and sporophorous vesicles, the fine structure of the spores, and numerical characters. The new species, which are named S. alba and S. candida, are compared to the octosporoblastic microsporidia parasitic in Odonata. An emended diagnosis of the genus Systenostrema is given, together with a taxonomic summary. The new combinations S. trichostegiae for Thelohania trichostegiae Baudoin, 1969 and Amblyospora capillata for T. capillata Larsson, 1983 are established.
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Larsson, J.I.R. On the taxonomy of the genus Systenostrema Hazard & Oldacre, 1975 (Microspora, Thelohaniidae), with description of two new species. Syst Parasitol 11, 3–17 (1988). https://doi.org/10.1007/BF00006972
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DOI: https://doi.org/10.1007/BF00006972
