Gustav Wilhelm Körber

The Lecanoraceae are a family of lichenized fungi in the order Lecanorales. Species of this family have a widespread distribution.

The Pertusariaceae are a family of lichen-forming fungi in the order Pertusariales.

Anaptychia is a genus of lichen-forming fungi in the family Physciaceae. Anaptychia species are foliose (leafy) to fruticose (bushy) lichens. They have brown, thin-walled spores with a single septum, and a prosoplechtenchymatous upper cortex.

Lecidella is a genus of crustose lichens in the family Lecanoraceae.

Lecanactis is a genus of crustose lichens, commonly called old wood lichens. The mycobiont (fungus partner) is in the family Roccellaceae. The photobiont is an algae in the genus Trentepohlia. These lichens typically grow as thin crusts on tree bark or rocks, producing small black fruiting bodies that may appear as round discs or elongated slits. The genus contains about 40 species found worldwide, with some species considered rare and threatened by habitat loss.

Dacampiaceae is a family of fungi belonging to the order Pleosporales. The family was circumscribed in 1855 by the German lichenologist Gustav Wilhelm Körber.

Porpidia is a genus of crustose lichens in the family Lecideaceae. Porpidia species primarily inhabit siliceous rocks, pebbles, and stonework, with rare occurrences on bark, wood, and compacted soil. The thallus, or body of the lichen, varies in appearance from thick and crusty to barely visible. It may form a continuous layer or develop cracks resulting in a segmented, areolate structure. The colour of the thallus ranges from grey and white to orange.

Lecanactis abietina, the old-wood lichen, is a species of leprose lichen in the family Roccellaceae. It forms a thin, mauve-grey to whitish-grey crust on the bark of both deciduous and coniferous trees, typically in shaded, humid habitats, and is regarded as characteristic of old-growth forests in cool temperate regions. The species is widespread in northern and central Europe and also occurs in North America, Australasia, and Papua New Guinea. Its nomenclatural history played a central role in the conservation of the genus Lecanactis, for which it serves as the type species.

Pleopsidium is a genus of lichen-forming fungi in the family Acarosporaceae (order Acarosporales). The widespread genus was circumscribed by lichenologist Gustav Wilhelm Körber in 1855. After a 2025 revision of the genus, it comprises eight species.

Lempholemma is a genus of lichen-forming fungi in the family Porocyphaceae. It comprises 14 species of gelatinous lichens that grow on rocks, mortar, bryophytes, or soil. These lichens form thin, often inconspicuous mats that can take various shapes—from wart-like crusts to tiny leaf-shaped scales or delicate tufts—and turn dark blue-green and gelatinous when damp due to their partnership with nitrogen-fixing cyanobacteria. Established as a genus in 1855 by the German lichenologist Gustav Wilhelm Körber to separate certain gelatinous lichens from the genus Collema, Lempholemma species

Lecidella carpathica is a species of crustose lichen in the family Lecanoraceae. It was formally described as a new species in 1861 by the German lichenologist Gustav Wilhelm Körber. Three secondary metabolites that occur in this species, hopane-6α,22-diol, brialmontin, and atraric acid, inhibit the enzyme protein tyrosine phosphatase 1B. This enzyme is a therapeutic target for diabetes treatments and plays a major role in negative regulation of the insulin signaling pathway. In Nepal, Lecidella carpathica has been reported from 3,900 to 4,000 m elevation in a compilation of published

Hymeneliaceae is a family of lichen-forming fungi in the order Baeomycetales. It contains three genera and about 40 species. The family was circumscribed by German lichenologist Gustav Wilhelm Körber in 1855. Lichens in the Hymeneliaceae are saxicolous (rock-dwelling) and crustose, occurring predominantly in the cool-temperate climates to subarctic climates of both the Northern and Southern hemispheres.

Arthonia didyma is a species of lichen belonging to the family Arthoniaceae. It is native to Eurasia and North America.

Stenocybe is a genus of fungi in the family Mycocaliciaceae. It has 14 species.

Schadonia is a genus of lichen-forming fungi. Established by German lichenologist Gustav Wilhelm Körber in 1859, this genus of crustose lichens is characterised by its black, sessile apothecia (fruiting bodies), muriform ascospores, and growth on mosses, plant debris, and rocks in montane habitats. While traditionally placed in the family Ramalinaceae, recent studies have suggested its classification may be uncertain within the order Lecanorales, with some researchers proposing its placement in the Ectolechiaceae or the resurrection of the family Schadoniaceae. The genus currently comprises

Pyrrhospora is a genus of lichen-forming fungi in the family Lecanoraceae. The genus was established in 1855 by the German lichenologist Gustav Wilhelm Körber, who named it after the distinctive reddish-brown colour of the spores, combining Greek words meaning 'reddish-brown' and 'spore'. These lichens form thin crusty films on rocks and tree bark, producing button-shaped fruiting bodies that start reddish-brown and turn almost black with age. The genus contains eight species and is distinguished by its unique spore colouration and chemical compounds including anthraquinone pigments that give

Pleopsidium flavum (gold cobblestone lichen) is a distinctively colored, bright lemon-yellow to chartreuse crustose lichen that grows in high elevations (montane to alpine) on vertical or overhanging hard felsic rock (e.g. granite) in western North America. Its thallus grows in a circular outwardly radiating pattern (placodioid), with 1mm wide lobed edges. This is the identity of the vivid, lime-green lichens often photographed on granite boulders in the Wichita Mountains Wildlife Refuge of Oklahoma. According to Prof. Wayne Armstrong of Mount Palomar College, This lichen only grows "a few

Naetrocymbe is a genus of about 20 species of fungi belonging to the family Naetrocymbaceae. These fungi typically live embedded in the bark of smooth-trunked trees and are barely visible except for tiny dark dots that contain their spores. Most species function primarily as bark-dwelling fungi, with only some forming casual partnerships with algae to create lichens. The genus was established in 1865 by Gustav Wilhelm Körber, with the name derived from Greek words meaning 'spindle' and 'boat' in reference to the characteristic spore shape. These fungi reproduce through flask-shaped structures

Leptorhaphis is a genus of lichens in the family Naetrocymbaceae. Members of the genus are commonly called birchbark dot lichens. The genus comprises eight recognized species that are widely distributed, primarily growing on the bark of deciduous trees such as birch, aspen, and larch. Most species lack a visible thallus and are considered saprobic rather than truly lichenized, as they generally do not form a stable partnership with algae.

Leptogium cyanescens, commonly called the blue jellyskin, is a foliose, gelatinous lichen in the family Collemataceae. It is one of the most widespread members of its genus, recorded throughout temperate and subtropical regions on at least four continents.

Cercidospora is a genus of fungi in the class Dothideomycetes. The relationship of this taxon to other taxa within the class is unknown (incertae sedis). The genus was first described by Gustav Wilhelm Körber in 1865; it is synonymous with the name Prolisea described by Frederick Edward Clements in 1931.

Aspicilia cinerea (cinder lichen) is a gray to almost white, 1.5–15 cm (0.59–5.91 in) wide, crustose areolate lichen with large apothecia that mostly grows on rock in the mountains. It grows in variable forms, from having a continuous surface to being areolate. It grows in Eurasia, and North America on siliceous rock, schist or igneous rock in habitats exposed to sunlight, also rarely on calciferous rock. It is common in Arizona, and rare in California and Baja California at elevations of 1,700 to 3,300 metres (5,600 to 10,800 ft). In Nepal, Aspicilia cinerea has been reported at 4,300 m

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Strangospora is a genus of lichen-forming fungi. It is the only genus in the family Strangosporaceae, which itself is of uncertain taxonomic placement in the Ascomycota. It contains 10 species.

Steinia is a genus of lichen-forming fungi in the family Aphanopsidaceae. The genus was established in 1873 by Gustav Wilhelm Körber and contains three recognised species. These lichens grow on disturbed soil and form very thin, powdery crusts that are often barely visible to the naked eye. They produce small, dark brown to black fruiting bodies that contain unusually large numbers of ascospores—up to 16 in each spore-bearing structure.

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Rhizocarpon viridiatrum is a species of saxicolous (rock-dwelling), crustose lichen in the family Rhizocarpaceae. The species is characterized by its distinctive yellowish-green colouration due to rhizocarpic acid and its parasitic lifestyle, initially growing on other crustose lichens before becoming independent. It forms small, compact thalli rarely exceeding 2 cm across, composed of tiny areoles with scattered black fruiting bodies. The lichen is found across Europe, typically inhabiting siliceous to moderately calcareous rock surfaces such as basalt.

Rhagadostoma is a genus of fungi in the family Nitschkiaceae. All species in the genus are lichenicolous, meaning they live parasitically on lichens.

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Porocyphus is a genus of lichen-forming fungi in the family Porocyphaceae. The genus was established in 1855 by the German lichenologist Gustav Wilhelm Körber to distinguish certain lichens from the related genus Collema, based on differences in their reproductive structures. Porocyphus species are found worldwide and are characterised by their pore-like fruiting bodies and simple spores. They form dark, gelatinous crusts on rocks, soil, and bark.