The Marasmiaceae are a family of fungi in the order Agaricales. Basidiocarps are most frequently agarics, but occasionally cyphelloid. According to a 2008 estimate, the family contained 54 genera and 1590 species, but molecular research, based on cladistic analysis of DNA sequences, has led to a more restricted family concept, so that the Marasmiaceae included just 13 genera, and some 1205 species. It was reduced further down in 2020, to 10 genera and about 700 species.
Coprinellus is a genus of mushroom-forming fungi in the family Psathyrellaceae. The genus was circumscribed by the Finnish mycologist Petter Adolf Karsten in 1879. Most Coprinellus species were transferred from the once large genus Coprinus. Molecular studies published in 2001 redistributed Coprinus species to Psathyrella, or the segregate genera Coprinopsis and Coprinellus.
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.
Arrhenia is a genus of fungi in the family Hygrophoraceae. Arrhenia also includes species formerly placed in the genera Leptoglossum and Phaeotellus and the lectotype species itself has an unusual growth form that would not normally be called agaricoid. All of the species grow in association with photosynthetic cryptogams such as mosses, including peat moss, and alga scums on decaying wood, and soil crusts consisting of mixes of such organisms. Typically the fruitbodies of Arrhenia species are grey to black or blackish brown, being pigmented by incrusting melanized pigments on the hyphae.
Melanoleuca is a poorly known genus of saprotrophic mushrooms traditionally classified in the family Tricholomataceae. Most are small to medium sized, white, brown, ocher or gray with a cylindrical to subcylindrical stipe and white to pale yellowish gills. The basidiospores are ellipsoid and ornamented with amyloid warts. Melanoleuca is considered a difficult group to study due to their macroscopic similarities among species and the need of a thorough microscopic analysis to separate species. DNA studies have determined that this genus is closely related to Amanita and Pluteus and that it does not belong to the family Tricholomataceae.
Panus is a genus of fungi in the family Polyporaceae.
Lentinus is a genus of fungi in the family Polyporaceae. The genus is widely distributed, with many species found in subtropical regions.
Clitopilus is a genus of fungi in the family Entolomataceae. The genus has a widespread distribution, especially in northern temperate areas. Although a 2008 estimate suggested about 30 species in the genus, a more recent publication (2009) using molecular phylogenetics has redefined the genus to include many former Rhodocybe species.
Resinomycena is a genus of fungi in the mushroom family Mycenaceae. The genus contains at least eight species found in North America, Europe and eastern Asia. This genus of small white to tan colored agarics is saprophytic and colonizes leaf litter, bark, small twigs and decaying monocot vegetation. The fruitbodies are small and resemble Mycena or Marasmius or Hemimycena and are distinguished by amyloid spores, poorly dextrinoid tissues, and the abundant oily, resinous cystidia on the pileus, lamellae edges and stipes. One recently described species, Resinomycena fulgens from Japan that is a synonym of Resinomycena japonica, has luminescent fruitbodies.
The Porotheleaceae are a family of saprotrophic, mainly wood-decay fungi in the order Agaricales that are primarily agarics, but also include cyphelloid fungi. The family has been informally cited in the literature as the 'hydropoid' clade. The type genus, Porotheleum, was placed in the phylogenetically defined clade in 2002, but the clade was more strongly supported in 2006, although without including Porotheleum. Its sister group is the Cyphellaceae, both of which are in the 'marasmioid clade'. Some included taxa are cultivated by ants. More recently, the family has been recognized in three analyses that included Porotheleum.
