Arctomiaceae

The Arctomiaceae are a family of lichen-forming fungi in the Ascomycota, class Baeomycetales. The family was named by Theodor Magnus Fries in 1861, with Arctomia as the type genus. Species in this family are found in arctic and subarctic habitats, usually associated with bryophytes. In overall morphology, the Arctomiaceae combine features that are otherwise uncommon together within the Ostropomycetidae: a consistent association with cyanobacterial genus Nostoc, gelatinous thalli, and fruiting bodies that develop openly rather than being enclosed.