Atractiellales is an order of fungi within the class Atractiellomycetes in the Basidiomycota division. Members of this order are mostly saprotrophic, meaning they obtain nutrients by decomposing dead organic matter, particularly wood and leaf litter. They are typically microscopic and produce simple, often gelatinous or effused fruiting bodies. Atractiellales fungi play an important ecological role in nutrient cycling and the decomposition of plant material. Some species are known from freshwater habitats, and their life cycles include both sexual and asexual stages, with basidiospores being a key reproductive feature. Overall, this order represents a small but ecologically significant group of basidiomycetous fungi.