The Pertusariales are an

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

of fungi in the class

Lecanoromycetes Lecanoromycetes is the largest class of lichenized fungi. It belongs to the subphylum Pezizomycotina in the phylum Ascomycota. The asci (spore-bearing cells) of the Lecanoromycetes most often release spores by rostrate dehiscence. Genera of unc ...

. It contains the following families: Agyriaceae,

Coccotremataceae The Coccotremataceae are a family of lichen-forming fungi in the order Pertusariales. Species in this widely distributed family grow on bark or rocks, especially in maritime regions. Genera , Species Fungorum accepts 3 genera and 23 species, in ...

, Icmadophilaceae,

Megasporaceae Megasporaceae are a family of fungi belonging to the order Pertusariales. Taxa are lichenized with green algae, and grow on rocks, often in maritime climates close to fresh water. Phylogenetic analysis has shown that this family is related to the ...

Microcaliciaceae ''Microcalicium'' is a genus of lichen-forming fungi in the order Pertusariales. It is the only genus in the monotypic family Microcaliciaceae. These taxa were circumscribed by the Finnish lichenologist Edvard August Vainio in 1927, with '' Micr ...

Ochrolechiaceae The Ochrolechiaceae are a family of lichenized fungi in the order Pertusariales The Pertusariales are an order of fungi in the class Lecanoromycetes. It contains the following families: Agyriaceae The Agyriaceae are a family of licheniz ...

, Pertusariaceae,

Varicellariaceae ''Varicellaria'' is a genus of crustose lichens. It is the only genus in the family Varicellariaceae. Taxonomy The genus ''Varicellaria'' was circumscribed by Finnish lichenologist William Nylander in 1858, with '' Varicellaria microsticta'' ass ...

, and Variolariaceae. Many of these fungi form

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Pertusaria paratuberculifera'' (2 verrucae) Image:Pertusaria_paratuberculifera_(EU1).jpg, '' Pertusaria paratuberculifera'' (8 spores per ascus)

References

Lichen orders Lecanoromycetes orders Taxa named by David Leslie Hawksworth Taxa named by Maurice Choisy Taxa described in 1986 {{Pertusariales-stub