| Collybiopsis | |
|---|---|
 | |
| Collybiopsis quercophila , the oak-leaf pinwheel | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Omphalotaceae |
| Genus: | Collybiopsis (J.Schröt.) Earle (1909) |
| Type species | |
| Collybiopsis ramealis | |
| Synonyms [1] | |
| |
Collybiopsis is a resurrected genus of mushroom-forming fungi in the family Omphalotaceae.
Collybiopsis is a genus of fungi in the family Omphalotaceae, order Agaricales. It was established by Franklin Sumner Earle in 1909 with Agaricus ramealis as the type species. [2] The genus encompasses a large clade of non-typical Gymnopus species and includes elements previously classified under Gymnopus, Marasmius , and Marasmiellus . While some researchers have used the name Marasmiellus for this group, Collybiopsis has nomenclatural priority. The Collybiopsis ramealis complex has been shown to be genetically diverse. Molecular phylogenetics studies have led to the reclassification of numerous tax within this genus. As of 2024, several new species have been proposed within Collybiopsis. [3] Some mycologists argue that the genus Collybiopsis may not encompass all species currently classified under Marasmiellus. As a result, they advocate for continued use of Singer's concept of Marasmiellus until the taxonomic relationships are more definitively resolved. [4]
Species of Collybiopsis have a diverse range of fruiting body forms, including shapes reminiscent of the genera Collybia, Gymnopus, Marasmiellus, Omphalina , and Pleurotus. Their gills may be free or extend down the stipe (decurrent). The stipe can be centrally or eccentrically positioned and may grow directly from the substrate (insititious) or have a slightly wider base (subinsititious). Microscopically, Collybiopsis is characterised by ellipsoid to oblong spores that are transparent (hyaline) and do not react with iodine stain (inamyloid). These spores produce white spore prints. The stipe surface features specialised cells called caulocystidia. The cap's outer layer (pileipellis) is distinguished by coral-like or branching (diverticulate) structures at the tips of its fungal filaments. [5]
As of October 2024 [update] , Species Fungorum (in the Catalogue of Life) accept 60 species of Collybiopsis. [6]
Hygrocybe is a genus of agarics in the family Hygrophoraceae. Called waxcaps in English, basidiocarps are often brightly coloured and have dry to waxy caps, white spores, and smooth, ringless stems. In Europe they are characteristic of old, unimproved grasslands which are a declining habitat, making many Hygrocybe species of conservation concern. Four of these waxcap-grassland species, Hygrocybe citrinovirens, H. punicea, H. spadicea, and H. splendidissima, are assessed as globally "vulnerable" on the IUCN Red List of Threatened Species. Elsewhere waxcaps are more typically found in woodlands. Most are ground-dwelling and all are believed to be biotrophs. Around 150 species are recognized worldwide. Fruit bodies of several Hygrocybe species are considered edible and are sometimes offered for sale in local markets.
Cuphophyllus is a genus of agaric fungi in the family Hygrophoraceae. Cuphophyllus species belong to a group known as waxcaps in English, sometimes also waxy caps in North America or waxgills in New Zealand. In Europe, Cuphophyllus species are typical of waxcap grasslands, a declining habitat due to changing agricultural practices. As a result, four species, Cuphophyllus atlanticus, C. colemannianus, C. lacmus, and C. lepidopus are of global conservation concern and are listed as "vulnerable" on the IUCN Red List of Threatened Species.
Collybia is a genus of mushrooms in the family Tricholomataceae. The genus has a widespread but rare distribution in northern temperate areas, and contains three species that grow on the decomposing remains of other mushrooms.
Rhizomarasmius is a genus of fungi in the family Physalacriaceae, containing about five species.
Gymnopus is a genus of fungus in the family Omphalotaceae. The genus has a widespread, cosmopolitan distribution and contains about 300 species.
Marasmiellus is a genus of fungi in the family Omphalotaceae. The widespread genus, circumscribed by American mycologist William Murrill in 1915, contains over 250 species. The name comes from the Greek marasmus meaning wasting.
Mycetinis is a genus of fungus in the Omphalotaceae family, containing about eight species formerly classified in Marasmius.
Connopus is a fungal genus in the family Omphalotaceae. The monotypic genus was circumscribed in 2010 to accommodate the species Connopus acervatus, formerly in the genus Gymnopus. It is found in North American and Europe, where it grows in dense clusters on decaying wood. It is regarded as inedible.
Setulipes was a proposed genus of fungi in the family Marasmiaceae. This group of mushrooms, described by the Czech mycologist Vladimír Antonín in 1987, has a widespread distribution in north temperate areas, and would contain about 25 species.
Mycetinis opacus is a species of agaric fungus first described in 1849 by Miles Joseph Berkeley and Moses Ashley Curtis as Marasmius opacus. Andrew Wilson and Dennis Desjardin transferred it to Mycetinis in 2005.
Collybiopsis biformis is a species of agaric fungus in the family Omphalotaceae found in North America. The species was originally described by Charles Horton Peck in 1903 as Marasmius biformis. The specific epithet biformis refers to the two distinct cap shapes, which Peck noted could be either campanulate (bell-shaped) or flattened. R.H. Petersen transferred the fungus to the genus Collybiopsis in 2021.
Paraxerula is a genus of fungi in the family Physalacriaceae. It was circumscribed in 2010 by mycologist Ron Petersen to replace Xerula section Hyalosetae, proposed by Heinrich Dörfelt in 1984. Petersen originally included P. caussei, P. hongoi, and the type species P. americana. The Chinese species P. ellipsospora was added to the genus in 2014.
Collybiopsis confluens, commonly known as the clustered toughshank, is a type of mushroom from the Omphalotaceae family. The fruiting body appears from summer until autumn in deciduous and coniferous forests. Collybiopsis confluens is not an edible mushroom.
Collybiopsis affixa, the little stinker, is a species of fungus in the family Omphalotaceae. It occurs in Asia and Australia. While it has been considered a basidiolichen by some researchers, its status as a lichenised fungus remains uncertain.