Fungi named in 1852

Ochrolechia is the sole genus in the fungal family Ochrolechiaceae. It comprises about 40 species of crustose lichens. These lichens typically form uneven, often thick, crust-like growths on various surfaces and are characterised by their white to pale grey thalli, which may have a greenish tint. The genus has a long evolutionary history, with fossils dating back to the Paleogene period, about 34 million years ago. Ochrolechia species have disc-like apothecia (fruiting bodies), which are usually yellowish or brownish-pink and often covered with a fine white powdery coating. The genus is

Candelaria is a genus of lichen-forming fungi in the family Candelariaceae. The genus was circumscribed by Italian lichenologist Abramo Bartolommeo Massalongo in 1852.

Puccinia malvacearum, also known as hollyhock or mallow rust, is a fungal species within the genus Puccinia known for attacking members of the family Malvaceae. An autoecious pathogen, it can complete its life cycle using a single host. It was originally found on the leaves of a species of Malva in Chile. Other plants also affected by the rust include Abutilon, Alcea (Hollyhock), Hibiscus, Lavatera, Malvastrum and Sphaeralcea. Suggested control measures (in the US), include sanitation (removal or destruction of affected plants or plant portions) or treatment with fungicides.

Acarospora is a genus of mostly lichen-forming fungi in the family Acarosporaceae. Most species in the genus are crustose lichens that grow on rocks in open and arid places all over the world. They may look like a cobblestone road or cracked up old paint, and are commonly called cobblestone lichens or cracked lichens. They usually grow on rock (are "saxicolous"), but some grow on soil (terricolous) or on other lichens. Some species in the genus are fungi that live as parasites on other lichens (lichenicolous fungi). Acarospora is a widely distributed genus, with about 128 species according to

Aspicilia (sunken disk lichen) is a genus of mostly crustose areolate lichens that grow on rock. Most members have black apothecia discs that are slightly immersed in the areolas, hence the common name"Given the same reason, the naming of Aspicilia is derived from the Greek word for "shield concave". Most of the species of this genus grow on calcareous and acidic rocks and most of the taxa prefer temperate and arctic habitats. Some members of the genus Aspicilia are pioneer species on granite and other hard rock, after which members of other lichen species may grow on them, such as members of

Arthothelium is a genus of lichen-forming fungi in the family Arthoniaceae. Species in the genus typically form crusts on smooth bark in humid, undisturbed habitats. They are distinguished from the related genus Arthonia by their spores, which are divided by both transverse and longitudinal walls into a brick-like pattern. The genus has a cosmopolitan distribution, with most species occurring in tropical regions.

Haematomma is a genus of crustose lichens established by Abramo Bartolommeo Massalongo in 1852. It is the sole genus in the Haematommataceae, a family circumscribed by Josef Hafellner in 1984. Commonly called bloodstain lichens, the species assigned to this genus are widely distributed in tropical and temperate areas. The genus name Haematomma means "bloody eye", a reference to the color of the lichen's apothecia.

Bactrospora is a genus of lichen-forming fungi of uncertain familial placement in the order Arthoniales. These lichens grow as thin crusts on tree bark in shaded, humid environments and are distinguished by their unusually long, needle-like spores that often break apart into smaller pieces. Species in the genus are found worldwide, particularly in tropical and temperate forests where they help form part of the diverse bark-dwelling (corticolous) lichen community.

Teloschistes flavicans, also known as the golden hair-lichen, is a lichenized species of fungus in the genus Teloschistes (meaning "split-ends"; a reference to its finely divided thallus and dense coils which appear almost like brillopads), family Teloschistaceae. Recognized by its saffron-coloured pigmentation, this widespread fruticose lichen grows on rocks and branches of trees.

Schismatomma is a genus of mostly lichen-forming fungi in the family Roccellaceae. These lichens form thin crusts on bark or rock surfaces and reproduce through disc-shaped fruiting bodies that release spores, as well as through powdery patches that help them spread. At least one species is critically endangered due to habitat loss from deforestation in Colombia.

Polyblastia is a genus of lichenized fungi in the family Verrucariaceae. As of 2020, it consists of about 40 species combined with about 50 orphaned species. The main difference with the genus Verrucaria is related to spores, which are muriform in Polyblastia.

Ophioparma ventosa is a species of lichen belonging to the family Ophioparmaceae. It has cosmopolitan distribution. Synonym: Lichen ventosus L. (= basionym) Haematomma ventosum (L.) A.Massal.

Catillaria is a genus of crustose lichens in the family Catillariaceae. The genus was circumscribed by Italian lichenologist Abramo Bartolommeo Massalongo in 1852. It is the type genus of Catillariaceae, which was circumscribed by Austrian lichenologist Josef Hafellner in 1984.

Arthopyrenia is a genus of fungi in the family Trypetheliaceae. It was formerly classified in the eponymic family Arthopyreniaceae, but molecular phylogenetics studies showed that the type species, Arthopyrenia cerasi, was a member of the Trypetheliaceae. Arthopyrenia fungi typically form inconspicuous films embedded within tree bark and produce tiny, flask-shaped fruiting bodies covered by dark, shield-like caps. The genus includes both lichen-forming species (those that partner with algae) and non-lichenized species, with about 100 currently recognized species found primarily on bark and

Ampelomyces quisqualis is an anamorphic fungus that is a hyperparasite of powdery mildews. This parasitism reduces growth and may eventually kill the mildew. These mycoparasites can live up to 21 days on mildew-free host plant surfaces, attacking powdery mildew structures as soon as they appear. A. quisqualis is used as the active ingredient in a commercial fungicide.

Diploicia canescens is a widespread species of lichen-forming fungus in the family Caliciaceae. It is found throughout much of the world, occurring on every continent except Antarctica. It is a crustose lichen with distinctive lobed margins that grows in rosettes up to 6 cm (2.4 in) across, appearing white to pale gray with white-pruinose marginal lobes. The species contains various biologically active compounds including depsidones, depsides, and phthalides. It typically grows on rocks, old walls, and tree trunks, particularly favoring nutrient-enriched areas such as birds' perching stones,

Diploicia is a genus of lichen-forming fungi in the family Caliciaceae. The genus has a widespread distribution, especially in temperate regions, and contains seven species. These lichens form small, tightly attached rosettes with a distinctive pale grey-green colour and a fine, powdery coating that becomes more noticeable when dry. They reproduce through tiny black, pin-prick fruiting bodies that emerge from the crust surface and through powdery outgrowths that can break off and spread the lichen to new locations.

Badhamia utricularis is a species of slime mold in the family Physaraceae. It was first described as Sphaerocarpus utricularis by Jean Baptiste François Pierre Bulliard in 1789, and was assigned to the genus Badhamia by Miles Joseph Berkeley in 1852.

Bacidia rubella is a species of corticolous (bark-dwelling), crustose lichen in the family Ramalinaceae. First described in 1796, it features a grey to yellow-green thallus with small granular structures covering its surface. When present, its distinctive fruiting bodies (apothecia) range from pale to dark red-brown in colour, measuring up to 1 mm in diameter. The species occurs widely throughout Britain and Ireland and is also broadly distributed across lowland central and northern Europe, typically inhabiting nutrient-rich bark of mature trees such as maple, ash, and elm in parklands,

Acarospora schleicheri, the soil paint lichen, is a bleached to bright yellow areolate to squamulose lichen that commonly grows to 10 cm (4 in) on soil (terricolous) in arid habitats of southern California and Baja California, also in Europe and Africa. It produces rhizocarpic acid as a secondary metabolite, which gives it a yellow coloration and serves to protect it from the sun. Its lower surface is also yellow. It can be greenish when moist. Roundish, angular, or irregularly shaped squamules are 0.5–4 mm in diameter. There are 0–1 (sometimes 2–3) apothecia embedded in the thallus, with

Scoliciosporum is a genus of lichens in the family Scoliciosporaceae.

Rhizocarpon petraeum is a species of saxicolous (rock-dwelling) crustose lichen in the family Rhizocarpaceae. It is widely distributed in Europe. This lichen forms a thin, chalk-white to grey crust that spreads over rock surfaces up to about 5 cm across, with scattered black disc-shaped fruiting bodies that rarely exceed 1 mm in diameter. It grows on sedimentary and volcanic rocks such as trachyte and basalt, and was first described in 1787 from specimens found in various locations across Europe.

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Mycoblastus sanguinarius, commonly known as the bloody heart lichen, is a widespread species of crustose lichen in the family Tephromelataceae. It is distinguished by its pale to dark grey thallus, which can appear very irregular and uneven, often with a thick, coarse, wart-like texture. The thallus may be continuous or somewhat cracked, with a prothallus that ranges from pale to dark grey. The apothecia (fruiting bodies) are frequent, black, and become convex or hemispherical as they mature. These structures develop on a bright carmine-red thalline cushion, which is revealed when the thallus

Microstoma is a genus of cup fungi in the order Pezizales.

Diploschistes scruposus (crater lichen) is a pale gray to white, warty to cracked (areolate) crustose lichen with black, urn-shaped (urceolate) fruiting bodies (apothecia). It is found worldwide on growing on rock (saxicolous) that is siliceous, in open areas in Mediterranean, temperate and polar areas, from the low tropics to high altitudes. It is in the family Graphidaceae. In California, it is the most common member of the Diploschistes genus. It is not covered in a powdery white coating (epruinose), which distinguishes it from other members of the genus. In Nepal, Diploschistes scruposus

Dimelaena oreina, the golden moonglow lichen, is a greenish yellow placodioid lichen. The color of the greenish yellow thallus is derived from usnic acid in the cortex.

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Ampelomyces is a genus of mycoparasitic fungi in the family Phaeosphaeriaceae. Ampelomyces parasitizes the group of fungal plant pathogens known as powdery mildews (Erysiphales). The type species is Ampelomyces quisqualis which was circumscribed by Italian botanist Vincenzo de Cesati in Klotzsch, Bot. Ztg. vol.10 on page 301 in 1852.