The order Christianseniales is a group of fungi within the phylum Ascomycota, characterized primarily by their microscopic, sac-like spore-producing structures called asci. Members of this order are typically saprophytic, meaning they decompose dead organic matter, and are often found in soil, leaf litter, or decaying plant material. They tend to have simple, filamentous hyphae and produce tiny, often inconspicuous fruiting bodies. While not of major economic or medical importance, Christianseniales play an ecological role in nutrient cycling and the breakdown of organic substrates in terrestrial ecosystems.