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1 species
Hydropisphaera is a genus of perithecial ascomycetes characterized by their specific ascomatal wall structure and rapid collapse upon drying. They are often found on decaying herbaceous stems and wood. The genus was resurrected and redefined by Rossman et al. (1999) to accommodate species formerly placed in Nectria that possess specific wall traits and Acremonium-like anamorphs.
Ascomata are superficial, non-stromatic, and often have a 'cupulate' collapse when dry. The ascomatal wall is typically thin (less than 20 µm) or composed of large, thin-walled cells. Many species possess distinct hairs (fasciculate or scattered) on the perithecial surface. Ascospores are hyaline and septate.
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