Bacidia is a genus of lichen-forming fungi in the family Ramalinaceae. The genus was circumscribed by Giuseppe De Notaris in 1846.
Acanthothecis is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed by Frederick Edward Clements in 1909.
Sarcopyrenia is a genus of lichenicolous (lichen-dwelling) fungi. It has 11 species. It is the only genus in Sarcopyreniaceae, a family in the order Verrucariales. Sarcopyrenia was circumscribed by Finnish lichenologist William Nylander in 1858, with Sarcopyrenia gibba assigned as the type species. Sarcopyreniaceae is one of the few families composed entirely of lichenicolous fungi.
Chrysothrix is a genus of lichen-forming fungi in the family Chrysotrichaceae. They are commonly called gold dust lichens or sulfur dust lichens, because they are bright yellow to greenish-yellow, sometimes flecked with orange, and composed entirely of powdery soredia. Apothecia are never present in North American specimens.
Phlyctis is a genus of lichenized fungi in the order Gyalectales, and the type genus of the family Phlyctidaceae. Members of the genus are commonly called blemished lichens.
Xyleborus is a genus of lichen-forming fungi in the family Stereocaulaceae. It has two species. The genus was circumscribed in 2009 by Richard C. Harris and Douglas Ladd with Xyleborus sporodochifer assigned as the type species. A second species, X. nigricans, was added to the genus in 2015.
Trichosphaerella buckii is a species of lichenicolous fungus in the family Niessliaceae. It was described as a new species in 2016 by Richard Harris and James Lendemer. The type was found growing immersed in a moribund thallus of the lichen Punctelia rudecta, which itself was on the trunk of a maple tree. This tree was in the Alligator River Game Land, in the Coastal Plain region of eastern North Carolina. Although at the time of publication the fungus was known only from the type locality, it was suspected to have a larger distribution, considering its lichen host has a widespread North American distribution.
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.
Loxospora is a genus of lichen-forming fungi in the family Sarrameanaceae. It has 13 species. The genus was circumscribed by Italian lichenologist Abramo Bartolommeo Massalongo in 1852, with Loxospora elatina assigned as the type species. This crustose lichen was originally named Lecanora elatina by Erik Acharius in 1810.
Lepraria harrisiana is a species of leprose lichen in the family Stereocaulaceae. It is widespread in the eastern United States where it occurs in humid habitats, such as conifer swamps and riparian forests.
Bagliettoa marmorea is a species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. It is endolithic on calcareous rocks, meaning it grows under and around the rock crystals. The colour of the lichen is purple to pink, although sometimes it is grey with purple pigments visible only around the perithecia. It does not have a shield-shaped involucrellum, which is typical of several other species in genus Bagliettoa. The excipulum measures 0.2–0.3 mm in diameter and lacks colour other than the upper part, which is purple. Ascospores are 13–30 by 9–15 μm.
Leimonis erratica is a species of crustose lichen in the family Pilocarpaceae. A widely distributed species that grows on siliceous rock, it is found in Asia, Australia, North America, and Réunion.
Leprocaulon beechingii is a species of saxicolous (rock-dwelling), leprose lichen in the family Leprocaulaceae. Found in the southern Appalachian Mountains of eastern North America, it was formally described as a new species in 2020 by lichenologist James Lendemer. Its main distinguishing physical characteristic is the placodioid thallus of the normandinoides-type, with raised, crisp margins. Chemically, it contains the secondary chemical products zeorin and usnic acid. The latter of these substances gives the thallus a greenish-yellow colouration.
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.
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.
Phlyctis sirindhorniae is a little-known species of corticolous (bark-dwelling), crustose lichen in the family Phlyctidaceae. It shares some similarities with Phlyctis agelaea but can be distinguished by its smaller ascospores, larger apothecia, and a higher number of ascospores per ascus. It is only known to exist in a specific location in northeastern Thailand.
Phlyctis subhimalayensis is a species of corticolous (bark-dwelling), crustose lichen in the family Phlyctidaceae. It is found in certain high-elevations regions of the Himalayas and Southwestern China.
Bathelium carolinianum is a species of crustose lichen in the family Trypetheliaceae. It is found in the eastern United States.
Baeomyces carneus is a species of terricolous and saxicolous, squamulose lichen in the family Baeomycetaceae. It was first scientifically described as a new species in 1821 by the German lichenologist Heinrich Gustav Flörke, in his work Deutsche Lichenen. It maintains its original name after two centuries of taxonomic history. The lichen has a circumpolar distribution, typically in coniferous forests but extending north to tundra in North America. It is widely distributed in the boreal forest region of North America, and also occurs in Europe, New Zealand, the West Indies, and Hawaii.
Sporodophoron americanum is a rare species of corticolous (bark-dwelling), crustose lichen in the family Arthoniaceae. Found in northeastern North America, it was formally described as a new species in 2013 by the lichenologists James Lendemer, Erin Tripp, and Richard C.Harris. Damien Ertz and Andreas Frisch transferred it to Sporodophoron in 2015. The main morphological characteristics of the lichen include its blue-grey thallus, Trentepohlia algal photobiont partner, and white sporodochia. It has been assessed as an endangered species for the IUCN Red List.
