The Exobasidiomycetes are a

class Class or The Class may refer to: Common uses not otherwise categorized * Class (biology), a taxonomic rank * Class (knowledge representation), a collection of individuals or objects * Class (philosophy), an analytical concept used differently ...

fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately fr ...

sometimes associated with the abnormal outgrowths of plant tissues known as

gall Galls (from the Latin , 'oak-apple') or ''cecidia'' (from the Greek , anything gushing out) are a kind of swelling growth on the external tissues of plants, fungi, or animals. Plant galls are abnormal outgrowths of plant tissues, similar to be ...

s. The class includes '' Exobasidium camelliae'' Shirai, the camellia leaf gall and ''

Exobasidium vaccinii ''Exobasidium vaccinii'', commonly known as “red leaf disease,” or “Azalea Gall,” is a biotrophic species of fungus that causes galls on ericaceous plant species, such as blueberry and azalea ('' Vaccinium'' and ''Rhododendron'' spp.). A ...

'' Erikss, the leaf and flower gall. There are eight

orders 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 ...

in the Exobasidiomycetes, including the Ceraceosorales, Doassansiales, Entylomatales, Exobasidiales, Georgefischeriales,

Malasseziales ''Malassezia'' (formerly known as ''Pityrosporum'') is a genus of fungi. It is the sole genus in family Malasseziaceae, which is the only family in order Malasseziales, itself the single member of class Malasseziomycetes. ''Malassezia'' species a ...

, Microstromatales and the Tilletiales. Four of the eight orders include

smut fungi The smuts are multicellular fungi characterized by their large numbers of teliospores. The smuts get their name from a Germanic word for dirt because of their dark, thick-walled, and dust-like teliospores. They are mostly Ustilaginomycetes (phylum ...

. The families

Ceraceosoraceae The Ceraceosorales are an order of smut fungi in the class Exobasidiomycetes. It is a monotypic order, consisting of a single family, the Ceraceosoraceae, which in turn contain a single monotypic genus, ''Ceraceosorus''. ''C. bombacis'' is a ...

and

Malasseziaceae ''Malassezia'' (formerly known as ''Pityrosporum'') is a genus of fungi. It is the sole genus in family Malasseziaceae, which is the only family in order Malasseziales, itself the single member of class Malasseziomycetes. ''Malassezia'' species a ...

were formally validated in 2009 for the orders Ceraceosorales and Malasseziales, respectively.

References

External links

Forestry Images - Exobasidiomycetes
Ustilaginomycotina Fungus classes Taxa described in 2007 {{Ustilaginomycotina-stub