Ramboldia is a genus of lichen-forming fungi in the family Ramboldiaceae. The genus was circumscribed in 1994 by Gintaras Kantvilas and John Alan Elix. It was emended in 2008 by the inclusion of Pyrrhospora species containing the anthraquinone russulone in their apothecia and having a prosoplectenchymatous exciple. The family Ramboldiaceae was circumscribed in 2014 to contain the genus.
Lepraria is a genus of leprose crustose lichens that grows on its substrate like patches of granular, caked up, mealy dust grains. Members of the genus are commonly called dust lichens. The main vegetative body (thallus) is made of patches of soredia. There are no known mechanisms for sexual reproduction, yet members of the genus continue to speciate. Some species can form marginal lobes and appear squamulose. Because of the morphological simplicity of the thallus and the absence of sexual structures, the composition of lichen products are important characters to distinguish between similar species in Lepraria.
Lepraria pacifica, the Pacific dust lichen, is a whitish-blue-green leprose crustose lichen that grows on its substrate like patches of granular, caked-up, mealy dust grains. Like other members of the Lepraria genus, it only reproduces asexually.
Punctelia perreticulata is a widely distributed species of foliose lichen in the family Parmeliaceae. It occurs in Mediterranean Europe and Russia, North America, South America, Australia, and New Zealand, where it grows on rocks, bark, or wood. Its main distinguishing features are its thallus surface, marked with many shallow depressions, grooves, or pits, and sorediate pseudocyphellae. The lower side of the thallus is ivory to tan towards the centre and the major secondary metabolite in the medulla is lecanoric acid. A lookalike species with which it has been historically confused is Punctelia subrudecta; this lichen can be distinguished from Punctelia perreticulata by the texture of the thallus surface, or, more reliably, by the length of its conidia.
Japewiella dollypartoniana is a species of crustose lichen in the family Lecanoraceae. It is widely distributed in the Appalachian Mountains of eastern North America, and has also been reported from Ontario, Canada. The lichen grows on tree branches and sapling and shrub stems at middle to high elevations.
Ochrolechia africana, commonly known as the frosty saucer lichen, is a species of crustose and corticolous (bark-dwelling) lichen in the family Ochrolechiaceae. It is a widely distributed species, found in tropical and subtropical areas of southern Africa, Asia, Australia, North America, and South America. The lichen is characterized by the presence of a white "frosty" or powdery apothecia.
Chrysothrix flavovirens is a species of crustose and corticolous (bark-dwelling) lichen in the family Chrysotrichaceae. It was formally described as a new species in 1994 by Tor Tønsberg as the sorediate counterpart of the common and widespread Chrysothrix candelaris. The type specimen was collected from Kirkeøy, Norway, where it was found growing on Picea abies. It has a pale greenish-yellow thallus that contains rhizocarpic acid. The lichen is widespread in Europe, and has also been recorded from Japan and North America. In the Atlantic and Mediterranean biogeographic regions of Portugal, it prefers to grow on the acidic bark of coastal conifer trees.
Lecanora substerilis is a species of corticolous (bark-dwelling), crustose lichen in the family Lecanoraceae. It is found in Eastern Europe, in old-growth beech forests of the Carpathian Mountains in the Czech Republic, Slovakia, Romania and Ukraine.
Albemarlea is a fungal genus in the family Fuscideaceae. A monotypic genus, it contains the single corticolous (bark-dwelling) lichen species Albemarlea pamlicoensis discovered in the Bull Neck Swamp of the Albemarle-Pamlico Peninsula, North Carolina. Characterized by a crust-like thallus, Fuscidea-type asci, and a green coccoid photobiont, A. pamlicoensis demonstrates unique morphological characteristics that distinguish it from other polysporous lichens. Although it shows certain similarities to the genera Maronea and Piccolia, the differences in apothecia and absence of specific pigments mark its distinctiveness. As this species has been found in only one location despite extensive surveys, it highlights the need for continued conservation efforts and further research to ascertain its full distribution and potential threats.
Chrysothrix chamaecyparicola is a species of corticolous (bark-dwelling), crustose lichen in the family Chrysotrichaceae. Found in the eastern United States, it was formally described as a new species in 2010 by lichenologist James Lendemer. Initially thought to be a North American population of the lookalike Chrysothrix flavovirens, it is now recognized as a separate species due to its distinguishing characteristics. It is particularly noted for its strong affinity for the bark of Atlantic white cedar trees and its dominance in conifer swamps across eastern North America.
Chrysothrix insulizans is a species of leprose lichen in the family Chrysotrichaceae. It is a distinctive species of lichen characterized by its bright yellow-green to yellow-orange coloring and unique growth patterns. Most collections have been found growing on rocks, although a few have been recorded growing on bark.
Fissurina alligatorensis is a species of corticolous (bark-dwelling) crustose lichen in the family Graphidaceae. Characteristics of the lichen include its lack of secondary compounds and an ecorticate thallus. Its habitat is centred around the Alligator River National Wildlife Refuge in North Carolina, USA, and it has a preference for soft-barked trees. While it can easily be confused with other Fissurina species, there are specific characters that distinguish it, such as its violet ascospores and its lirellate fruiting bodies.
Opegrapha ramisorediata is a rare species of corticolous (bark-dwelling), crustose lichen in the family Opegraphaceae. Known to occur only in northeastern Brazil, it was described as a new species in 2017. It is characterised by a thin, pale greenish-mauve thallus.
Phlyctis monosperma is a species of corticolous (bark-dwelling), crustose lichen in the family Phlyctidaceae. It is characterised by its greyish-white, loose, granular thallus, single-spored asci, and distinctive chemical substances. The lichen is found in the subtropical evergreen forests of the Eastern Himalayas and Western Ghats of India, where it grows on rough tree bark in close association with plant-dwelling bryophytes at elevations above 2,000 m (6,600 ft). It also occurs in Sri Lanka.
Piccolia nannaria is a species of crustose lichen in the class Lecanoromycetes. It is widespread but uncommon in the coastal plain of southeastern North America. Initially thought to be corticolous (bark-dwelling), later collection of the lichen suggest that it may be lichenicolous (lichen-dwelling).
Bacidia depriestiana is a sorediate crustose lichen that grows on the bark of Quercus alba along forested streambanks on steep slopes in the Southern Appalachian Mountains in the United States. First described in 2021, it has so far only been found in three locations, in Tennessee, North Carolina, and South Carolina.
Chrysothrix chlorina, the sulphur dust lichen, is a species of leprose (powdery) crustose lichen in the family Chrysotrichaceae. Originally described scientifically by the Swedish lichenologist Erik Acharius over 200 years ago, it has been shuffled to many different genera in its taxonomic history before finally being transferred to Chrysothrix in 1981. The lichen has a circumboreal distribution, meaning it occurs in northern boreal regions across the planet. It is typically saxicolous (rock-dwelling), particularly on the underside of rock overhangs, but has in rare instances been recorded growing on bark and various other surfaces.
Pseudothelomma ocellatum is a species of lignicolous (wood-dwelling), crustose lichen in the family Caliciaceae. This lichen is characterised by its grey, areolate thallus that produces abundant lichenised diaspores, such as short spherical isidia and coarse, dark brown-black soredia. It is typically sterile, meaning apothecia are absent.
Endocena is a genus of lichen-forming fungi in the family Icmadophilaceae. It has two species. Endocena is characterised by a thallus that can range from crustose to somewhat fruticose, with features such as hollow pustules, pseudopodetia, and granular phyllocladia. Apothecia, or sexual fruiting bodies, are rare and poorly developed. The three taxa within the genus have distinct distributional ranges, with Endocena informis var. informis being widely distributed in southern South America, while Endocena informis var. falklandica is common in the Falkland Islands, and Endocena buckii has a restricted range in Chilean Tierra del Fuego.
Serusiauxia is a monotypic fungal genus in the family Pyrenulaceae. It contains a single species, Serusiauxia inexpectata, a corticolous (bark-dwelling), crustose lichen found in Mauritius. Serusiauxia is morphologically distinct within the Pyrenulaceae due to its sorediate thallus and chemistry involving gyrophoric acid, a combination of characteristics that is not observed in any other Pyrenulaceae genera.
