Martin Westberg

Silobia rufescens is a lichenized fungus, with a dark gray or brown crust-like appearance. It is widespread, and grows on siliceous rock. S. rufescens is in the genus Silobia, which is segregated from the genus Acarospora due to its budding apothecia with only lateral exciple.

Candelaria pacifica is a widely distributed corticolous (bark-dwelling), leprose lichen. It was formally described as a species in 2011. It is a very small, yellow, bark-dwelling lichen that is often confused with the similar Candelaria concolor but differs in having eight-spored asci, lacking a lower cortex, and producing fewer rhizines. The species is widespread in western North America and has become increasingly recognized across Europe, where herbarium revisions have shown that many specimens previously identified as C. concolor belong to this species. It grows mainly on nutrient-rich

Candelariella lichenicola is a rare species of lichenicolous (lichen-dwelling) fungus in the family Candelariaceae. This species was first found in Sonora, Mexico, and is characterised by its distinct spore shape and chemical composition. It is typically found growing on the lichen species Candelina submexicana, and while not widespread, it contributes to the ecological diversity of the regions it inhabits.

Candelariella immarginata is a species of parasitic, saxicolous (rock-dwelling) lichen in the family Candelariaceae. Found in the United States, it was formally described as a new species in 2007 by Swedish lichenologist Martin Westberg. The type specimen was collected in the desert west of Grantsville, Utah at an elevation of 4,300 ft (1,300 m); here it was found growing on dry exposed quartzite. At the time of publication, it had also been found in another location in Utah, and two locations in Nevada; its general geographic range is the Great Basin in western North America. In 2015, it was

Candelariella deppeanae is a species of lichen in the family Candelariaceae. Found in southwestern North America, it was formally described as a new species in 2007 by the Swedish lichenologist Martin Westberg. The type specimen was collected in the Chiricahua Mountains (Chiricahua National Monument, Arizona) at an elevation of 1,750 m (5,740 ft). Here, in an oak forest, it was found growing on a decorticated (barkless) part of alligator juniper (Juniperus deppeana). Most collections of the lichen are from the wood or trunks of this juniper plant; the species epithet deppeanae alludes to this

Candelariella corallizoides is a species of squamulose (scaley), saxicolous (rock-dwelling) lichen in the family Candelariaceae. Found in Mexico, it was formally described as a new species in 2007 by Swedish lichenologist Martin Westberg. The type specimen was collected from the north-facing cliffs of the Sierra Agua Verde (in the Sierra de San Francisco mountain range, Baja California) at an elevation of 1,200 m (3,900 ft). Here, in open oak woodland with shrubs, it was found growing on siliceous rock. The lichen is known to occur in several localities in Baja California. The specific

Candelariella complanata is a species of squamulose (scaly) and saxicolous (rock-dwelling) lichen in the family Candelariaceae. Found in southwestern North America, it was formally described as a new species in 2007 by the Swedish lichenologist Martin Westberg. The type specimen was collected from a cliff of the Sierra Agua Verde (part of the Sierra de San Francisco mountain range, Baja California) at an elevation of about 1,000 m (3,300 ft); here it was found growing on volcanic rock. The thallus of the lichen is complanate (smooth) as a result of its flattened and peltate (like a shield or

Candelariella biatorina is a species of corticolous (bark-dwelling), crustose lichen in the family Candelariaceae. It is characterised by its distinct yellow hue and apothecia that are biatorine in form. The lichen grows on the trunks of various conifer species across the western United States, and in the Russian Far East.

Myriospora is a genus of crustose (crust-like), rock-dwelling lichens in the family Acarosporaceae. Its small, often mosaic-cracked thalli bear minute, blackish fruiting discs that each release dozens of colourless spores, a feature alluded to by the genus name—which means "countless spores". Following a 2024 transfer of Acarospora molybdina into the group, around thirteen species are accepted; the type species, M. smaragdula, is a common emerald-tinged "rock scale" on sun-exposed stone across the Holarctic realm. The genus was proposed in 1853 as a segregate of Acarospora but the original

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Placomaronea minima is a species of saxicolous (rock-dwelling) crustose lichen in the family Candelariaceae. Found in South America and Southern Africa, it was formally described as a new species in 2009 by lichenologists Martin Westberg and Patrik Frödén. The type specimen was collected by the second author from the Santiago Metropolitan Region (Chile) at an altitude of about 1,200 m (3,900 ft), where it was found growing on rocks on a hill outside of San José de Maipo. The species epithet minima refers to its small size.

Placomaronea mendozae is a species of saxicolous (rock-dwelling) crustose lichen in the family Candelariaceae. Found in South America and the United States, it was formally described as a new species in 1941 by Finnish lichenologist Veli Räsänen. The type specimen was collected in Las Heras, Mendoza (Argentina) in 1939. Räsänen named it as a variety of Candelariella vitellina; Martin Westberg promoted the taxon to distinct species status in 2004. The lichen occurs along the Andes in Argentina and Peru, and in Arizona, USA. It is the only Placomaronea that has been found in North America.

Placomaronea kaernefeltii is a rare species of saxicolous (rock-dwelling) lichen in the family Candelariaceae. Found in South America, it was formally described as a new species in 2009 by lichenologists Martin Westberg, Patrik Frödén, and Mats Wedin. The type specimen was collected by the second author from Arica (Chile), between Socoroma and Putre, at an altitude of 3,750 m (12,300 ft), where it was found growing along cracks and pits on a siliceous boulder in a dry mountain slope. The lichen is only known to occur at its type locality, although the authors suggest a wider distribution is

Placomaronea fuegiana is a species of saxicolous (rock-dwelling), crustose lichen in the family Candelariaceae. Found in South America, it was formally described as a new species in 2009 by Martin Westberg and Patrik Frödén. The type specimen was collected by the second author in Tierra del Fuego, Argentina, where it was found growing on sandstone. The species epithet fuegiana refers to the type locality. It also occurs in Pali-Aike National Park, where it grows in the pits of volcanic rocks.

Candelariella granuliformis is a species of terricolous (ground-dwelling) crustose lichen in the family Candelariaceae. It forms a yellow crust made up of tiny granules that break apart into smaller fragments for asexual reproduction. Fruiting bodies are rarely produced. The species occurs in arctic and alpine habitats across northern Canada, Scandinavia, and the mountains of the western United States.

Candelariella aggregata is a species of lichen in the family Candelariaceae. It is found in western North America, Mongolia, and Switzerland where it grows on mosses and plant debris.

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Candelariella corviniscalensis is a species of rock-dwelling lichen in the family Candelariaceae. It grows mostly within the rock, visible only as a pale grey patch on the sandstone surface, and produces small yellow to orange-yellow fruiting bodies. The species was described in 2011 from a single locality on Late Cretaceous sandstone in Colorado. Despite searches of similar rock types elsewhere in the western United States, no additional populations have been found.

Tremella cetrariellae is a lichenicolous fungus (a fungus that lives on lichens) in the family Tremellaceae. It is a parasitic fungus that grows exclusively on a ground-dwelling Arctic and alpine lichen called Cetrariella delisei, creating small brown or blackish swellings on the lichen's surface. The fungus was formally described in 2015 when researchers used DNA analysis to distinguish it from a closely related species, revealing that what had previously been treated as a single taxon actually comprised two distinct but morphologically similar species. Its distribution is restricted to

Sarcogyne albothallina is a species of rock-dwelling, crustose lichen-forming fungus in the family Acarosporaceae. It was formally described as a new species in 2016 from specimens collected from the Missouri Breaks region of Montana. It is differentiated from others in Sarcogyne by its white, non-powdery thallus and by the presence of 4-O-methylhiascic acid, a combination of features that separates it from other species sharing a blackened upper spore-bearing surface (carbonized epihymenium).

Crittendenia is a genus of lichenicolous (lichen-dwelling) fungi in the monogeneric family Crittendeniaceae. The genus was circumscribed in 2021 to contain two species, C. lichenicola, and the type, C. coppinsii; these species were previously classified in the genus Chionosphaera. An additional 16 species were added to the genus the following year. The genus name honours British lichenologist Peter Crittenden. Characteristics of Crittendenia include the tiny synnemata-like basidiomata, clamp connections, and aseptate tubular basidia from which 4–7 spores discharge passively, often in groups.

Acarospora brodoana is a species of saxicolous (rock-dwelling) crustose lichen in the family Acarosporaceae. It was described as a new species in 2016 from specimens collected in the San Bernardino Mountains in southern California. The type specimen was collected on granite from a steep terraced slope above the cirque near Dollar Lake. The species epithet honors the lichenologist Irwin M. Brodo. The lichen is distinguished from similar species by the combination of a blackened upper ascospore-bearing surface (carbonized epihymenium) and a black tissue layer beneath the spore-bearing region

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Myriospora signyensis is a crustose lichen in the family Acarosporaceae, known only from Signy Island (South Orkney Islands, Antarctica). It is characterised by a thallus that becomes distinctly lobed and often orange-red or rust-coloured at the margins, and by large, sessile apothecia with a prominent, raised rim. Molecular phylogenetics analyses place it as a well-supported sister to Myriospora scabrida, although it never attains the green-tinged colouration of that species and instead lacks the thick pigmented epinecral layer common in M. scabrida.

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