Ulrik Søchting

Polycauliona polycarpa is a species of corticolous (bark-dwelling), foliose lichen in the family Teloschistaceae. It was first formally described by German botanist Georg Franz Hoffmann in 1796, as Lobaria polycarpa. It has acquired quite an extensive synonymy in its taxonomic history. In 2013, Patrik Frödén and colleagues transferred it to the genus Polycauliona, as part of a molecular phylogenetics-based restructuring of the family Teloschistaceae. In northern North America, one vernacular name for the species is pin-cushion sunburst lichen.

Xanthomendoza oregana is a species of corticolous (bark-dwelling), foliose lichen in the family Teloschistaceae. It forms an orange to bright-yellow thallus with ascending lobes that gives it the overall appearance of a tuft. The lichen occurs in western and northern Europe and western North America.

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Variospora flavescens is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. It is a common, widely distributed species and has been recorded in Africa, Asia, Europe, and Macaronesia. It forms large, circular, orange patches up to 10 cm or more across on calcareous stone such as limestone and mortar. First described in 1762, the species has been placed in several genera and was transferred to Variospora in 2013.

Flavoplaca is a genus of crust-like or scaly lichens in the family Teloschistaceae. It has about 30 species with a mostly Northern Hemisphere distribution. The genus was established in 2013 when genetic studies revealed that these species formed their own distinct evolutionary group, separate from other lichen classifications where they were previously placed. These lichens typically grow on limestone and other calcium-rich rocks, forming distinctive orange to yellow crusty patches that are particularly common in coastal environments and sunny locations. Most species grow directly on rock

Bryoplaca is a small genus of lichen-forming fungi belonging to the family Teloschistaceae. Established in 2013 by Ulrik Søchting, Patrik Frödén and Ulf Arup, this small genus comprises just three species that specialise in growing on moss-covered substrates in cold regions of the Northern Hemisphere. These lichens are distinguished by their bright orange fruiting discs that stand out like tiny sunbursts against the mossy cushions they inhabit, earning the genus its name which literally means 'moss-plate'.

Athallia holocarpa is a species of lichenised fungus in the Teloschistaceae family. It was first described as Verrucaria oblitterata var. holocarpa by Georg Franz Hoffman in 1796, and transferred to the new genus, Athallia, in 2013 by Ulf Arup, Ulrik Søchting, and Patrik Frödén.

Athallia is a genus of lichen-forming fungi in the family Teloschistaceae. Most species have a poorly developed or almost invisible thallus, with the fruiting bodies often appearing to sit directly on the substrate. The genus occurs on bark, wood, and rock, and is found mainly in temperate regions of the Northern Hemisphere. All species share a characteristic set of orange anthraquinone pigments known as chemosyndrome A.

Xanthoparmelia knudsenii is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in the United States, it was formally described as a new species in 2009 by the lichenologists Arne Thell, John Alan Elix and Ulrik Søchting. The type specimen was collected from Mohave County, Arizona in May 2003. The species epithet honors American lichenologist Kerry Knudsen. The distribution of this species includes southwestern North America, extending south to central Mexico. It grows on acidic rocks in semi-open woodlands.

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Oxneria fallax, also known as the hooded sunburst lichen, is a small yellow-orange to red-orange foliose lichen that grows on bark or rarely on rock or bone. It is found all over the world except very dry areas. In Nepal, O. fallax has been reported from 3,200 to 3,400 m elevation in a compilation of published records. The non-fruiting body (thallus) grows in rosettes to 3 cm in diameter. The rosettes sometimes coalesce with each other. The lobes may appear divided at the tips. It is sometimes tightly appressed to the substrate (adnate), and sometimes not. The fruiting bodies (apothecia) are

Variospora aurantia is a species of lichen belonging to the family Teloschistaceae. In Sicily, it has been reported as a host for the lichenicolous fungus species Muellerella lichenicola.

Variospora is a genus of crustose lichens belonging to the family Teloschistaceae. The genus was established in 2013 when DNA studies revealed that many species previously grouped under the traditional large genus Caloplaca actually belonged to distinct evolutionary lineages. These bright orange lichens are distinguished by their variable ascospore shapes—which can be lemon-shaped, hourglass-shaped, or simply divided by a straight partition—and their distinctive purple reaction when tested with potassium hydroxide solution.

Squamulea subsoluta is a species of saxicolous (rock-dwelling), squamulose lichen in the family Teloschistaceae. It was first formally described by Finnish lichenologist William Nylander in 1873, who named it as a variety of Lecanora murorum. He promoted it to species status three years later, as Lecanora subsoluta. Ulf Arup and colleagues transferred the taxon to the genus Squamulea in 2013, following a molecular phylogenetics-based restructuring of the family Teloschistaceae.

Rufoplaca is a genus of lichen-forming fungi in the family Teloschistaceae. The genus is found primarily across the Northern Hemisphere, with most species occurring in Europe and additional records from North America and Asia. These lichens typically grow as thin crusts with orange-red colouration on sun-exposed rocks and other surfaces. The genus was established in 2013 to group together several previously scattered species that genetic studies showed formed a natural evolutionary lineage.

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Caloplaca ahtii is a species of corticolous (bark-dwelling) crustose lichen in the family Teloschistaceae. It was formally described as a new species in 1994 by Ulrik Søchting. The type locality was in Finland, and the type specimen was found growing on Populus. The species epithet honours Finnish lichenologist Teuvo Ahti. In 2022, the species was documented from North-Western European Russia. It is also found in North America.

Calogaya is a genus of lichen-forming fungi belonging to the family Teloschistaceae. It has 19 species. The genus was circumscribed in 2013 by Ulf Arup, Ulrik Søchting, and Patrik Frödén. The generic name Calogaya ("spectacular Gaya") honours Dr. Ester Gaya (fl. 2001), a Spanish botanist from the University of Barcelona.

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Xanthocarpia crenulatella is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae.

Variospora thallincola is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae.

Squamulea is a genus of lichen-forming fungi in the family Teloschistaceae. It has 15 species. The genus was circumscribed in 2013 by Ulf Arup, Ulrik Søchting, and Patrik Frödén, with Squamulea subsoluta assigned as the type species. Five species were included in the original account of the genus. The genus name alludes to the squamulose growth form of most of its species. Squamulea has a worldwide distribution; when the genus was originally created, the centre of distribution was thought to be in southwestern North America.

Sirenophila is a genus of rock-dwelling crustose lichens in the subfamily Teloschistoideae of the family Teloschistaceae. It comprises six species with an Australasian distribution. These lichens form crusty growths on rocks in coastal areas, with some species having distinct lobes at the edges while others have irregular margins. The genus is endemic to the Australasian region, where species colonise seashore rocks exposed to maritime conditions. Like many members of the Teloschistaceae, some Sirenophila species contain orange anthraquinone pigments.

Parvoplaca is a genus of lichen-forming fungi in the family Teloschistaceae. The genus was circumscribed in 2013 by Ulrik Søchting, Patrik Frödén, and Ulf Arup.

Pachypeltis is a genus of lichen-forming fungi in the family Teloschistaceae. It comprises six species.

Gyalolechia flavovirescens is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae.

Flavoplaca oasis is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. It is widely distributed across Europe, and has been reported in Western Asia, China, and North Africa.

Flavoplaca maritima is a species of crustose lichen in the family Teloschistaceae. It is found in costal areas of Northern, Western, and Southern Europe. It mostly occurs on rocks, but has also been recorded growing on wood.