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1 species
Xeromyces is a genus noted for its extreme xerophilic nature, capable of growing at water activities (aw) lower than almost any other known organism (down to ~0.61 aw). It is a monotypic genus (containing only X. bisporus) that poses a spoilage risk to low-moisture foods that are typically considered shelf-stable. Taxonomically, it is a key member of the Aspergillaceae, forming a distinct lineage related to Monascus.
Produces cleistothecia with evanescent asci containing only two ascospores (hence 'bisporus'), which are D-shaped and smooth. It lacks a complex asexual state, though chlamydospore-like cells may form. It is obligately xerophilic, often failing to grow on standard high-water-activity media like MEA or PDA.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
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