Malassezia 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 are naturally found on the skin surfaces of many animals, including humans. In occasional opportunistic infections, some species can cause hypopigmentation or hyperpigmentation on the trunk and other locations in humans. Allergy tests for these fungi are available.
The Ustilaginomycotina is a subdivision within the division Basidiomycota of the kingdom Fungi. It consists of the classes Ustilaginomycetes and Exobasidiomycetes, and in 2014 the subdivision was reclassified and the two additional classes Malasseziomycetes and Monilielliomycetes added. The name was first published by Doweld in 2001; Bauer and colleagues later published it in 2006 as an isonym. Ustilagomycotina and Agaricomycotina are considered to be sister groups, and they are in turn sister groups to the subdivision Pucciniomycotina.
Trichosporon is a genus of anamorphic fungi in the family Trichosporonaceae. All species of Trichosporon are yeasts with no known teleomorphs. Most are typically isolated from soil, but several species occur as a natural part of the skin microbiota of humans and other animals. Proliferation of Trichosporon yeasts in the hair can lead to an unpleasant but non-serious condition known as white piedra. Trichosporon species can also cause severe opportunistic infections (trichosporonosis) in immunocompromised individuals.
The Cuniculitremaceae are a family of fungi in the order Tremellales. There are three genera in the family. Sterigmatosporidium polymorphum parasitizes other fungi growing in insect galleries in wood. It does not produce basidiocarps, but has septate basidia similar to those found in the genus Tremella. Most species are known only from their yeast states.
The Cystofilobasidiaceae are a family of fungi in the order Cystofilobasidiales. Phylogenetic analyses shows that this family is clearly distinct from other yeast-like families of the Tremellomycetes. The family currently contains the single genus Cystofilobasidium. Additional genera previously referred to the Cystofilobasidiaceae are now placed in the Mrakiaceae.
The Filobasidiaceae are a family of fungi in the order Filobasidiales. Most species are yeasts, but some form gelatinous fruit bodies that are parasitic on other fungi, including lichens. The family currently contains five genera.
Filobasidium is a genus of fungi in the family Filobasidiaceae. Most species are only known from their yeast states, but some produce hyphae with haustorial cells, indicating that they are parasites of other fungi. Basidia are tubular with terminal, sessile basidiospores. Basidiocarps are not formed.
The Ustilaginaceae are a family of smut fungi in the order Ustilaginomycetes. Collectively, the family contains 17 genera and 607 species.
Papiliotrema is a genus of fungi in the family Rhynchogastremaceae. Filamentous states, where known, form septate basidia with haustorial cells indicating they are parasites of other fungi. Most species are currently known only from their yeast states. More than 20 species have been referred to Papiliotrema.
Cystofilobasidium is a genus of fungi in the family Cystofilobasidiaceae. Species occur as yeasts, but produce filamentous sexual states that form dikaryote teliospores, from which the unicellular basidia are formed. The hyphae usually have dolipore septa without a parenthesome, and their cell walls contain xylose. The genus currently contains nine species worldwide.
Naganishia is a genus of fungi in the family Filobasidiaceae. Species are currently only known from their yeast states, most of which were formerly referred to the genus Cryptococcus. Some 15 species have been described worldwide. Naganishia albida is an occasional human pathogen.
The Cryptococcaceae are a family of fungi in the order Tremellales. The family currently contains two genera. Some species produce filamentous, sexual states with distinctive basidia and are parasites of other fungi. Most, however, are only known from their yeast states. Several species of Cryptococcus are human pathogens.
The Bulleraceae are a family of fungi in the order Tremellales. The family currently contains five genera. Some species produce gelatinous basidiocarps and were formerly placed in the genus Tremella. Most, however, are only known from their yeast states.
The Bulleribasidiaceae is a family of fungi in the order Tremellales.
The Piskurozymaceae are a family of fungi in the order Filobasidiales. Most species are only known from their yeast states, but some produce filamentous sexual states with basidia that are parasitic on other fungi. The family currently contains two genera.
Solicoccozyma is a genus of fungi in the family Piskurozymaceae. Species have only been isolated in their yeast states, several of which were formerly referred to the genus Cryptococcus, but can produce filamentous states with basidia in culture. Nine species have been described worldwide.
The Trichosporonaceae are a family of fungi in the order Trichosporonales. The family currently contains six genera. Species are not known to produce basidiocarps, but exist as yeasts or produce septate hyphae with arthroconidia. Several species are human pathogens.
The Carcinomycetaceae are a family of fungi in the order Tremellales. The family currently contains a single genus. Some species produce filamentous sexual states with basidia and are parasites of other fungi. Some, however, are only known from their yeast states.
Apiotrichum is a genus of fungi in the family Trichosporonaceae. Species are only known from their yeast states, most of which were formerly referred to the genus Trichosporon. Twenty species have been described worldwide. Apiotrichum mycotoxinivorans is an occasional human pathogen.
Moesziomyces is a fungal genus in the family Ustilaginaceae.
