Fungi named in 1843

Microsporum is a genus of fungi that causes tinea capitis, tinea corporis, ringworm, and other dermatophytoses (fungal infections of the skin). Microsporum forms both macroconidia (large asexual reproductive structures) and microconidia (smaller asexual reproductive structures) on short conidiophores. Macroconidia are hyaline, multiseptate, variable in form, fusiform, spindle-shaped to obovate, 7–20 by 30–160 μm in size, with thin or thick echinulate to verrucose cell walls. Their shape, size and cell wall features are important characteristics for species identification. Microconidia are

Melampsora is a genus of Basidiomycota fungi. Melampsora species are plant pathogens.

Sphaerotilus natans is an aquatic periphyton bacterial organism associated with polluted water. These tightly sheathed filamentous bacteria colonies are commonly but inaccurately known as "sewage fungus"

Microsporum audouinii is an anthropophilic fungus in the genus Microsporum. It is a type of dermatophyte that colonizes keratinized tissues (primarily hair) causing infection. The fungus is characterized by its spindle-shaped macroconidia (7–30 × 35–160 μm), clavate microconidia (2.5–3.5 × 4–7 μm) as well as its pitted or spiny external walls.

Gyrophragmium is a genus of fungi in the family Agaricaceae. The genus was circumscribed by French botanist Camille Montagne in 1843. The species known as G. dunalii was determined to properly belong into genus Agaricus, and since Agaricus dunalii was a preoccupied name it is now known as Agaricus aridicola.

Bremia is a genus of water moulds in the family Peronosporaceae. The genus name of Bremia is in honour of Johann Jakob Bremi (1791–1857), a Swiss 'Kunsthandwerker' (artist wood turner) and entomologist from Zürich. The genus was circumscribed by Eduard August von Regel in Bot. Zeitung (Berlin) Vol.1 on page 665 in 1843. Members of the genus are obligate parasites whose hosts are members of the plant family Asteraceae, on which they form downy mildew. While previously thought to not be a particularly diverse genus with most records being attributed to the species Bremia lactucae (which is

Nephroma arcticum, the arctic kidney lichen, is a species of foliose (leafy), terricolous (ground-dwelling) lichen in the family Parmeliaceae. It has a yellowish-green thallus up to 8 cm (3 in) across made of large lobes, with a dark, tomentose lower surface. It is a tripartite lichen, consisting of a fungus and two photobiont partners: a species of nitrogen-fixing cyanobacteria (contained within dark, blistered cephalodia), and a species of green alga. First described by Carl Linnaeus in 1753, it is one of only two Nephroma species in North America that use green algae as their primary

Megalospora is a genus of lichen-forming fungi in the family Megalosporaceae.

Bremia lactucae is a plant pathogen. This microorganism causes a disease of lettuce (Lactuca sativa) denominated as downy mildew. Some other strains can be found on 36 genera of Asteraceae including Senecio and Sonchus. Experiments using sporangia from hosts do not infect lettuce and it is concluded that the fungus exists as a quantity of host-specific strains (formae speciales). Wild species, such as Lactuca serriola, or varieties of Lactuca can hold strains that infect lettuce, but these pathogens are not sufficiently common to seriously infect the plant. The severity of damage caused by

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Phellorinia is a genus of fungi in the family Phelloriniaceae of the order Agaricales. The genus is monotypic, and contains the single species Phellorinia herculeana, described by English naturalist Miles Joseph Berkeley in 1843 as P. inquinans. This single species has currently (February 2021) 24 synonyms, and takes its epithet from the basionym Scleroderma herculeanum Pers. The spores were used for body decoration by Australian Aboriginal groups in desert areas.

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Melanogaster ambiguus is a species of fungus in the family Paxillaceae, first described by Carlo Vittadini and given its current name by Edmond Tulasne and Charles Tulasne.

Hydnobolites is a genus of fungi within the Pezizaceae family.

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Protoderma is a genus of green algae in the family Chaetophoraceae.

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Omphalodium is a genus of lichenized fungi within the Parmeliaceae family. The genus contains about four species found in North and South America.

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