Fungi named in 1921

Trametes versicolor – also known as Coriolus versicolor and Polyporus versicolor – is a common polypore mushroom found throughout the world. Owing to its shape being similar to that of a wild turkey's tail feathers, T. versicolor is most commonly referred to as turkey tail. Although polysaccharide-K, an extract of T. versicolor, is approved in Japan as an adjuvant therapy in cancer treatment, it is not approved in the United States for treatment of cancer or any clinical condition. Extracts of turkey tail or the mushroom itself are commonly marketed as a dietary supplement for various health

Hygrophoropsis aurantiaca, commonly known as the false chanterelle, is a species of fungus in the family Hygrophoropsidaceae. Austrian naturalist Franz Xaver von Wulfen described the false chanterelle in 1781, noting both its resemblance with the true chanterelles and people's propensity to confuse them. The false chanterelle was then placed in the genus Clitocybe, but it was later observed that its forked gills and dextrinoid spores indicated a relationship to Paxillus. Genetic analysis has confirmed that it belongs to the order Boletales and is more closely related to boletes. The fruit

Melanophyllum is a genus of fungi in the family Agaricaceae. The widespread genus contains four species.

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Phyllactinia taurica is a species complex of powdery mildews in the family Erysiphaceae. It is found across the world, where it affects a vast array of different plant families. Phyllactinia taurica is one of the most polyphagous powdery mildew species in the world, although attempts have been made to split it in the past and it may be a complex of many cryptic species on different hosts.

Neobulgaria is a genus of fungi within the family Leotiaceae. The genus, circumscribed by the Austrian mycologist Franz Petrak in 1921, contains nine species.

Caloplaca marina, the orange sea lichen, is a crustose, placodioid lichen. It has wide distribution, and can be found near the shore on rocks or walls. Calos in Greek means nice, placa in Greek is shield. Caloplaca therefore means ‘beautiful patches’.

Coelomomyces is the only genus of fungi in the family Coelomomycetaceae. Species in the genus can be used as agents for the biological control of mosquitoes.

Phyllactinia is a genus of plant pathogenic fungi in the family Erysiphaceae (powdery mildews).

Verrucaria funckii is a species of crustose lichen in the family Verrucariaceae. It grows on rocks in aquatic environments. First described as a new species in 1826 and named after the German botanist Heinrich Christian Funck, it features a light grey-green to grey-brown, somewhat gelatinous thallus. Its reproductive structures are typically embedded within the body rather than projecting from it. The species is widespread throughout Europe, particularly in northern and western regions, as well as parts of Asia and North America, where it inhabits permanently or largely submerged siliceous

Mycosphaerella rubi is a fungal plant pathogen.

Lecanora subimmergens is a species of saxicolous (rock-dwelling) crustose lichen in the family Lecanoraceae. It is widely distributed, occurring in Asia, America, and Australasia.

Didymocyrtis is also a zoological genus of spumellarian Radiolaria. Didymocyrtis is a genus of lichenicolous fungi in the family Phaeosphaeriaceae. The genus was circumscribed by Finnish lichenologist Edvard August Vainio in 1921, with Didymocyrtis consimilis assigned as the type species.

Diaporthe perniciosa a species of fungus in the family Diaporthaceae. It is a plant pathogen. The names Phoma prunorum Cooke, Phomopsis prunorum (Cooke) Grove, and Phomopsis mali Roberts have been used for its asexual (anamorph) form. It causes bark cankers on trees in the genera Malus (apples), Pyrus (pears) and Prunus (plums, cherries, peaches and other similar fruits). It has also been implicated in dieback disease of plums. One study in the late 1980s was able to isolate the fungus from several trees with die-back symptoms but inoculation of healthy trees with the fungus did not result in

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Sagediopsis is a genus of fungi in the family Adelococcaceae.

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Henrica is a genus of crustose lichens in the family Verrucariaceae. It has four species. These lichens grow as crusts that adhere tightly to limestone, sandstone, and other hard rocks, ranging from paper-thin films to thick, warted layers in subdued colours of white, pale grey, or fawn. They reproduce through black to dark-brown flask-shaped fruiting bodies that contain distinctive brown spores divided into numerous cells like a brick wall, giving them a characteristic muriform appearance.

Boeremia lycopersici (syn. Didymella lycopersici) is a fungal plant pathogen infecting tomatoes and strawberries.

Dicarpella is a genus of fungi within the Melanconidaceae family.

Dermatocarpon meiophyllizum is a species of lichen belonging to the family Verrucariaceae.

Dermatocarpon deminuens is a species of lichen belonging to the family Verrucariaceae.

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Cryptodiaporthe is a genus of fungi in the family Gnomoniaceae. The genus contains 24 species.

Aplopsora is a genus of rust fungi in the Chaconiaceae family. The genus contains about six species.

Allantoporthe is a genus of fungi within the Diaporthaceae family.