Pucciniomycotina is a subdivision of fungus within the division Basidiomycota. The subdivision contains 10 classes, 21 orders, and 38 families. Over 8400 species of Pucciniomycotina have been described - more than 8% of all described fungi. The subdivision is considered a sister group to Ustilaginomycotina and Agaricomycotina, which may share the basal lineage of Basidiomycota, although this is uncertain due to low support for placement between the three groups. The group was known as Urediniomycetes until 2006, when it was elevated from a class to a subdivision and named after the largest order in the group, Pucciniales.
The Agaricostilbomycetes are a class of fungi in the subdivision Pucciniomycotina of the Basidiomycota. The class consists of a single order, six families, and 15 genera. Most species are known only from their yeast states. Where known, basidiocarps (fruitbodies) are typically small and stilboid (pin-shaped).
The Microbotryomycetes are a class of fungi in the subdivision Pucciniomycotina of the Basidiomycota. The class currently contains eight orders, plus three additional, unassigned families, plus seven additional, unassigned genera. Many species are known only from their yeast states. Species with hyphal states typically produce auricularioid basidia and are often parasitic on other fungi or plants. Several species in the genera Rhodotorula and Sporobolomyces are opportunistic human pathogens.
Pucciniomycetes is a diverse class of fungi in the subphylum Pucciniomycotina of phylum Basidiomycota. The class contains 5 orders, 21 families, 190 genera, and approximately 8,016 species. It has been estimated that this class contains about one third of all teleomorphic basidiomycetes. Pucciniomycetes contains many economically important plant pathogenic fungal rusts; the order Pucciniales is the largest clade in this class, representing approximately 7,000 species.
The Heterogastridiales are an order of fungi in the class Microbotryomycetes. The order contains a single family, the Heterogastridiaceae, which currently contains five genera. Some species in the order are currently known only from their yeast states. Those producing hyphal states have auricularioid basidia and are parasitic on other fungi. Basidiocarps, when present, are minute and variously stilboid (pin-shaped), pustular, or pycnidioid (flask-shaped). Molecular research, based on cladistic analysis of DNA sequences, has shown that the order is a monophyletic (natural) group, though the type and only species of Krieglsteinera has not yet been sequenced and may belong elsewhere.
The Leucosporidiales are an order of fungi in the class Microbotryomycetes. The order contains a single family, the Leucosporidiaceae, which in turn contains a single genus, Leucosporidium. The order comprises fungi that are mostly known from their yeast states, though some produce hyphal states in culture that give rise to teliospores from which auricularioid basidia emerge.
The Sporidiobolales are an order of fungi in the subdivision Pucciniomycotina. The order contains a single family, the Sporidiobolaceae, which currently contains three genera. Most species are known only from their yeast states. Hyphal states produce teliospores from which auricularioid basidia emerge, bearing basidiospores. Species occur worldwide and have been isolated from a wide variety of substrates. Two species, Rhodotorula mucilaginosa and R. glutinis, have been known to cause disease in humans.
Leucosporidium is a genus of fungi in the subdivision Pucciniomycotina. The genus comprises fungi that are mostly known from their yeast states, though some produce hyphal states in culture that give rise to teliospores from which auricularioid basidia emerge. Species known only from their anamorphic yeast states were formerly referred to the genus Leucosporidiella, but, following changes to the International Code of Nomenclature for algae, fungi, and plants, the practice of giving different names to teleomorph and anamorph forms of the same fungus was discontinued, meaning that Leucosporidiella became a synonym of the earlier name Leucosporidium. Species have been isolated predominantly from cold environments and are regarded as psychrotolerant.
The Kriegeriales are an order of fungi in the subdivision Pucciniomycotina. Most species are known only from their yeast states and can be found in a variety of habitats, ranging from arctic waters to tropical ferns. Hyphal states produce auricularioid basidia.
The Agaricostilbales are an order of fungi in the class Agaricostilbomycetes. The order consists of six families and 15 genera.
The Agaricostilbaceae are a family of fungi in the order Agaricostilbales. Basidiocarps (fruitbodies}, where known, are stalked and capitate and produce spores on basidia that are laterally septate. Most species are known only from their yeast states. The family contains two genera.
The Chionosphaeraceae are a family of fungi in the order Agaricostilbales. The family contains six genera. Some species form small, stilboid (pin-shaped) fruitbodies. Others are known only from their yeast states.
Jianyuniaceae is a family of fungi in the order Agaricostilbales. The family contains three genera. Species are known only from their yeast states.
The Spiculogloeomycetes are a class of fungi in the subdivision Pucciniomycotina of the Basidiomycota. The class consists of a single order, the Spiculogloeales, together with an additional, unassigned genus, Meniscomyces. Many species are currently known only from their yeast states. Species in the genus Spiculogloea form hyphal states that produce auricularioid basidia and are parasitic on other fungi.
The Spiculogloeales are an order of fungi in the subdivision Pucciniomycotina of the Basidiomycota. The order is currently monotypic, consisting of a single family, the Spiculogloeaceae. Species in the genus Phyllozyma are currently known only from their yeast states. Species in the genus Spiculogloea form hyphal states that produce auricularioid basidia and are parasitic on other fungi.
The Cystobasidiaceae are a family of fungi in the order Cystobasidiales. The family currently comprises two genera, both of which contain fungal parasites with auricularioid basidia, some of which are known only from their yeast states.
The Cystobasidiales are an order of fungi in the class Cystobasidiomycetes. The order currently consists of a single family (Cystobasidiaceae) and two genera as yet unassigned to a family.
Occultifur is a genus of fungi in the family Cystobasidiaceae. Species are parasites of other fungi and, microscopically, have auricularioid basidia and basidiospores that germinate by yeast cells. Several species are currently only known from their yeast states. The genus is distributed worldwide.
The Camptobasidiaceae are a family of fungi in the subdivision Pucciniomycotina. The family currently comprises two genera, one of which (Camptobasidium) contains an aquatic, hyphal species with auricularioid basidia. The other genus contains species currently known only from their yeast states.
Kriegeria is a genus of fungi in the subdivision Pucciniomycotina. The genus is currently monotypic, containing the single species Kriegeria eriophori. The species is a plant pathogen, parasitic on sedges, and produces auricularioid basidia and basidiospores that germinate to form a yeast state.
