Fungi named in 2020

The Fomitopsidaceae are a family of fungi in the order Polyporales. Most species are parasitic on woody plants, and tend to cause brown rots. The name comes from Fomitopsis (meaning "looking like Fomes") + -aceae (a suffix used to form taxonomic family names).

The Nidulariaceae (from "nidulus": "small nest") are a family of fungi in the order Agaricales. Commonly known as the bird's nest fungi, their fruiting bodies resemble tiny egg-filled birds' nests. As they are saprobic, feeding on decomposing organic matter, they are often seen growing on decaying wood and in soils enriched with wood chips or bark mulch; they have a widespread distribution in most ecological regions. The five genera within the family, namely, Crucibulum, Cyathus, Mycocalia, Nidula, and Nidularia, are distinguished from each other by differences in morphology and peridiole

Tulosesus congregatus is a species of mushroom producing fungus in the family Psathyrellaceae.

Chamonixia pachydermis, is a species of fungus in the family Boletaceae, found in New Zealand. Chamonixia pachydermis is common in areas of New Zealand beech forest and is often partially buried on the ground. It has a blue discoloration.

Peziza petersii is a species of apothecial fungus belonging to the family Pezizaceae. This is a European species with rather small and irregular brown saucer-shaped ascocarps up to 5 cm in diameter. It is most often encountered in tightly packed groups on burned ground from summer to autumn.

Aureoboletus betula is a species of mushroom producing fungus in the family Boletaceae. It is commonly known as the shaggy-stalked bolete.

Candolleomyces candolleanus (formerly known as Psathyrella candolleana), commonly known as the common brittlestem, is a species of fungus in the family Psathyrellaceae. The color is tannish when young, fading to white. It is found in lawns in North America.

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Leccinellum rugosiceps, commonly known as the wrinkled Leccinum, is a species of bolete fungus. It is found in Asia, North America, Central America, and South America, where it grows in an ectomycorrhizal association with oak. Fruitbodies have convex, yellowish caps up to 15 cm (5.9 in) in diameter. In age, the cap surface becomes wrinkled, often revealing white cracks. The stipe is up to 10 cm (3.9 in) long and 3 cm (1.2 in) wide, with brown scabers on an underlying yellowish surface. It has firm flesh that stains initially pinkish to reddish and then to grayish or blackish when injured. The

Laboulbenia quarantenae is a species of ectoparasitic fungi. It is closely related to Laboulbenia vulgaris, but differs enough in its DNA to make it a separate species. The species was discovered in 2020 on its host Bembidion biguttatum, a small ground beetle (Carabidae), in the Botanic Garden Meise. It was discovered by Danny Haelewaters and André De Kesel, who named it "quarantenae", as they formally described it during the quarantine measures in their respective countries, the United States and Belgium.

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Candolleomyces is a genus of fungi in the family Psathyrellaceae.

The Callistosporiaceae are a family of fungi in the order Agaricales. The family contains six genera. All species form agaricoid basidiocarps (gilled mushrooms). The family is based on recent DNA research.

Britzelmayria is a genus of fungi in the family Psathyrellaceae.

Tulosesus is a genus of fungi in the family Psathyrellaceae.

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Swinscowia is a genus of lichen-forming fungi in the family Strigulaceae. It has 34 species. Swinscowia was proposed in 2020 by the lichenologists Shu-Hua Jiang, Robert Lücking, and Emmanuël Sérusiaux to contain non-foliicolous species that were isolated from bark and rocks. Swinscowia jamesii, a species that was originally described in genus Geisleria, and later transferred to Strigula, is the type species of the genus. The genus name honours British lichenologist Dougal Swinscow, who originally described the type species in 1967.

Pisutiella is a genus of lichen-forming fungi in the family Teloschistaceae. It contains five species of saxicolous (rock-dwelling), crustose lichens that are found in a variety of environments in the Northern Hemisphere.

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Olegblumia is a monotypic fungal genus in the family Teloschistaceae. It contains the single species Olegblumia demissa, a saxicolous (rock-dwelling) crustose lichen.

Lendemeriella is a genus of crustose lichens in the subfamily Caloplacoideae of the family Teloschistaceae. It has ten species. The genus was circumscribed in 2020 by Sergey Kondratyuk, with Lendemeriella reptans assigned as the type species. The genus name honours the American lichenologist James Lendemer, who co-authored the type species in 2012 (as Caloplaca reptans). Lendemeriella species have an arctic-alpine, boreal-montane, and Mediterranean distribution in the Northern Hemisphere. They grow on twigs, wood, bryophytes, the bark of deciduous trees as well as Siberian fir. They also grow

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The Gymnosporangiaceae are a family of rust fungus genera, in the order Pucciniales, based on the type genus Gymnosporangium. The classification of fungal taxa based on only morphological characteristics has long been recognised as problematical, so this order was reviewed over a long-term study using three DNA loci (including type species wherever possible) and published in 2021.

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Xerocomellus diffractus, commonly known as the cracked-cap bolete, is a species of mushroom in the family Boletaceae. It is found in western North America.

Verrucaria vacillans is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is only known to occur in the Enontekiö Lapland region of northwestern Finland.

Verrucaria subdevergens is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It occurs in northeastern Finland.

Verrucaria kuusamoensis is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is found within a small region of northeastern Finland.