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Stachybotrys (asexual Hypocreales) has a worldwide distribution. This genus inhabits substrates rich in cellulose and is closely related to Memnoniella. Classification of species has previously been based on morphology, with conidial characters being considered as important. This study reevaluates Stachybotrys and Memnoniella, which is shown to include at least seven species-groups; while Memnoniella is a synonym of Stachybotrys. The sexual genera Ornatispora and Melanopsamma are also synonyms of Stachybotrys. With the exception of Stachybotrys subsimplex, species formed a wellsupported monophyletic group in LSU data analysis belonging to Stachybotriaceae. Seventy-four accepted Stachybotrys species are discussed, while eight species are considered to belong to other genera or are doubtful in this paper and a key to these species provided. Twelve new combinations and 1 nomina nova is proposed. The status of Stachybotrys species on health, as human or animal pathogens, in indoor environments, and use as biocontrol agents and compound discovery are also discussed.

Air sampling was conducted in Waterloo, Canada throughout 1992. Functional relationships between aeromycota and meteorological factors were analysed. The meteorological factors were, in descending order of importance: mean temperature, minimum temperature, maximum temperature, mean wind speed, relative humidity (RH), rain, maximum wind speed and snow. The most important airborne fungal propagules in descending order were total fungal spores, unidentified Ascomycetes, Cladosporium, Coprinus, unidentified Basidiomycetes, Alternaria and unidentified fungi. Most airborne fungal taxa and highly significant relationship with temperature, but Aspergillus/Penicillium, hyphal fragments were positively associated with wind speed. In comparison with other airborne fungal taxa, Leptosphaeria and unidentified Ascomycetes were more closely correlated with rain and RH during the growing season.

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