| Physocystidium | |
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| Genus: | Physocystidium |
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| Physocystidium cinnamomeum (Dennis) Singer | |
Physocystidium is a genus of fungi in the family Tricholomataceae. This is a monotypic genus, containing the single species Physocystidium cinnamomeum. This species is found in Trinidad, [1] and was originally described as new to science in 1951 as Collybia cinnamomea by mycologist R.W.G. Dennis; [2] Rolf Singer transferred it to the then newly created genus Physocystidium in 1962. [3]
The Hygrophoraceae are a family of fungi in the order Agaricales. Originally conceived as containing white-spored, thick-gilled agarics, including Hygrophorus and Hygrocybe species, DNA evidence has extended the limits of the family, so it now contains not only agarics, but also basidiolichens and corticioid fungi. Species are thus diverse and are variously ectomycorrhizal, lichenized, associated with mosses, or saprotrophic. The family contains 25 genera and over 600 species. None is of any great economic importance, though fruit bodies of some Hygrocybe and Hygrophorus species are considered edible and may be collected for sale in local markets.
The Tricholomataceae are a large family of mushrooms within the Agaricales. Originally a classic "wastebasket taxon", the family included any white-, yellow-, or pink-spored genera in the Agaricales not already classified as belonging to e.g. the Amanitaceae, Lepiotaceae, Hygrophoraceae, Pluteaceae, or Entolomataceae.
Callistodermatium is a fungal genus in the family Tricholomataceae. It is a monotypic genus, and contains the single species Callistodermatium violascens. The holotype was found in Brazil, and described by mycologist Rolf Singer in 1981.
Mycoalvimia is a genus of fungus in the family Tricholomataceae. It is a monotypic genus, and contains the single species Mycoalvimia theobromicola, found in Brazil.
Pegleromyces is a genus of fungi in the family Tricholomataceae. It is a monotypic genus, containing the single species Pegleromyces collybioides, found in Brazil, and described as new to science by mycologist Rolf Singer in 1981.
Arthrosporella is a fungal genus in the family Tricholomataceae. It is a monotypic genus, containing the single species Arthrosporella ditopa, found in South America. The genus was described by mycologist Rolf Singer in 1970.
Dennisiomyces is a genus of fungi in the family Tricholomataceae. Described by mycologist Rolf Singer in 1955, the genus contains five species found in South America.
Mycenella is a genus of fungi in the family Tricholomataceae. The widespread genus contains 10 species, found mostly in temperate regions. Mycologist Rolf Singer circumscribed the genus in 1938.
Neoclitocybe is a genus of fungi in the family Tricholomataceae. The widespread genus contains 10 species that are especially prevalent in tropical regions.
Porpoloma is a genus of fungi in the family Tricholomataceae. The genus contains about 12 species found predominantly in South America. Porpoloma was described by mycologist Rolf Singer in 1952 with P. sejunctum as the type species.
Pseudobaeospora is a genus of fungi in the family Tricholomataceae. A 2008 estimate placed about 20 species in the widespread genus.
Pseudoomphalina is a genus of fungi in the placed in the family Tricholomataceae for convenience. The genus contains six species that are widespread in northern temperate areas. Pseudoomphalina was circumscribed by Rolf Singer in 1956. Pseudoomphalina was found to be paraphyletic to Neohygrophorus in a molecular phylogenetics study and since Pseudoomphalina is an older name, Neohygrophyorus was synonymized with it. The type species of Neohygrophorus was Neohygrophorus angelesianus, now Pseudoomphalina angelesiana. In earlier classifications based on anatomy prior to DNA sequence-based classifications, its unusual combination of features led taxonomists to independently create two subgenera in two genera: Hygrophorus subg. Pseudohygrophorus and Clitocybe subg. Mutabiles; the latter based on Neohygrophorus angelesianus but described under a new species name which is now placed in synonymy, Clitocybe mutabilis. All species of Pseudoomphalina are united by the presence of clamp-connections in their hyphae, an interwoven gill trama and amyloid spores. Pseudoomphalina angelesiana possesses grey-violaceous pigments that turn red in alkali solutions and lacks filiform, hyphal sterile elements in its hymenium and stipitipellis. These were features used to distinguish it from Pseudoomphalina as a genus, but Pseudoomphalina umbrinopurpurascens possesses these same pigments and the filiform elements of Pseudoomphalina. Molecular phylogenetics studies have also found some former species of Pseudoomphalina to belong in other genera. Pseudoomphalina pachyphylla was moved to its own genus, Pseudolaccaria, and Pseudoomphalina clusiliformis was synonymized with it. Pseudoomphalina flavoaurantia and Pseudoomphalina lignicola were found to belong in Clitocybula. Phylogenetically, Pseudoomphalina is in a tricholomatoid clade but not in the Tricholomataceae.
Rimbachia is a genus of fungi in the family Tricholomataceae. The genus contains about ten species with a widespread distribution in tropical regions.
Ripartites is a genus of fungi in the family Tricholomataceae. The genus has a widespread distribution and originally contained five species. Species in Ripartites have small, round to subglobose spores, which are yellowish-brown and ornamented. Macroscopically, they resemble Clitocybe. Ripartites was circumscribed by Petter Karsten in 1879.
Nothoclavulina is a genus of fungus in the family Tricholomataceae. The genus is monotypic, containing the single species Nothoclavulina ditopa, described by American mycologist Rolf Singer in 1970. The species, found in Argentina, is an anamorphic version of the genus Arthrosporella. The generic name Nothoclavulina is Latin for "false Clavulina".
Amparoina spinosissima is a species of fungus in the family Tricholomataceae, and the type species of the genus Amparoina. It was originally named Mycena spinosissima by mycologist Rolf Singer in 1951, who had originally found the species in Argentina in 1949. He transferred it to Amparoina in 1958.
Callistosporium palmarum is a species of fungus in the family Tricholomataceae, and the type species of the genus Callistosporium. Originally named Gymnopus palmarum by William Alphonso Murrill in 1939, the species was transferred to the genus Callistosporium by Rolf Singer in 1944.
