Acanthotrema is a genus of lichens in the family Graphidaceae. The genus was circumscribed by German lichenologist Andreas Frisch in 2006, with Acanthotrema brasilianum assigned as the type species. Acanthotrema species are commonly found in rainforests ranging from lowland to montane environments.
Lecanora aberrata is a relatively rare species of crustose lichen in the family Lecanoraceae. It is found in Australia, where it grows on bark in subtropical and tropical rainforests. It has a grey-white to creamy white thallus.
Hertelidea wankaensis is a species of crustose lichen in the family Stereocaulaceae. It is found in northeastern Australia, where it grows on dead wood.
Enterographa serusiauxii is a species of leaf-dwelling lichen in the family Roccellaceae. It is found in Guadeloupe.
Sagiolechia phaeospora is a species of crustose lichen in the family Sagiolechiaceae. It is found in the alpine tundra of Alaska.
Allocetraria corrugata is a species of foliose lichen in the family Parmeliaceae. It is found in high-elevation locations in Yunnan, China, where it grows on rocks with mosses.
Byssoloma brunneodiscum is a species of foliicolous (leaf-dwelling) lichen in the family Pilocarpaceae. Found in China, it was formally described as a new species in 2020 by Wei-Cheng Wang and Jiang-Chun Wei. The type specimen was collected by Wang in the Mingfeng Valley of Jianfeng Ridge at an altitude of 960 m (3,150 ft). It is only known to occur at high-altitude rainforests on Hainan Island, where it grows sparsely on leaf surfaces in the damp understorey. The specific epithet brunneodiscum refers to the brown discs that are characteristic of the apothecia of this species. The lichen makes 2,5,7-trichloro-3-O-methylnorlichexanthone, a secondary chemical that is detectable using thin-layer chromatography. Byssoloma annuum is similar in appearance and chemistry, but is distinguished from B. brunneodiscum by its orange-yellow apothecia and colourless hypothecium.
Leptogium sphaerosporum is a species of corticolous (bark-dwelling), foliose lichen in the family Collemataceae. Found in Nepal, it was formally described as a new species in 2010 by Per Magnus Jørgensen and Louise Olley. The type specimen was collected on the track from Thulo Syabru to Bamboo (Langtang) at an elevation of 1,970 m (6,460 ft). Here, in a shady and humid mixed broad-leaved forest, it was found growing on the bark of Alnus nepalensis. It has a bluish-grey, foliose thallus measuring up to 5 cm (2.0 in) wide comprising smooth lobes up to 0.5 cm (0.2 in) broad. The apothecia are up to 1.5 mm (0.06 in) in diameter with a flat brown disc and a thallus margin that is pale blue. The ascospores are spheroid, muriform with rounded tips and have dimensions of 19–27 by 14–19 μm. Leptogium sphaerosporum is similar to Leptogium pedicellatum, but the latter species is distinguished by its ellipsoid ascospores that measure 25–30 by 10–15 μm.
Aderkomyces sikkimensis is a species of foliicolous (leaf-dwelling) crustose lichen in the family Gomphillaceae. Found in India, it was formally described as a new species in 2006 by Athokpam Pinokiyo, Krishna Pal Singh, and Robert Lücking. The type specimen was collected by the first author from a subtropical forest near Damthang (Sikkim). It has also been recorded from the Darjeeling district of West Bengal. The specific epithet refers to the region of the type locality.
Malmidea attenboroughii is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is known to occur from a single location in the Amazon rainforest of Bolivia.
Fuscidea multispora is a species of foliicolous (leaf-dwelling), crustose lichen in the family Fuscideaceae. Found in Bolivia, it is known to occur only in a single high-altitude locality in a national park, where it grows on the leaves of coniferous trees from the genus Podocarpus.
Micarea pauli is a species of corticolous and lignicolous, crustose lichen in the family Pilocarpaceae. It is only known to occur in Poland's Białowieża Forest.
Pyrenula luteopruinosa is a species of corticolous (bark-dwelling), crustose lichen in the family Pyrenulaceae. It has a neotropical distribution, occurring in Panama, Costa Rica, Puerto Rico, and Hawaii.
Phylloblastia verheyeniana is a species of foliicolous (leaf-dwelling) lichen in the family Verrucariaceae. Found in the Democratic Republic of the Congo, it was formally described as a new species in 2014 by Dries Van den Broeck, Robert Lücking, and Damien Ertz. The type specimen was collected by the first author at the Lomami River at an altitude of 487 m (1,598 ft). It is only known to occur in the Congo Basin, where it grows on the leaves of understory plants and shrubs. The species epithet honours Museum of Natural Sciences of Belgium zoologist Erik Verheyen.
Thelotrema lueckingii is a species of corticolous (bark-dwelling) crustose lichen in the family Graphidaceae. Found in the laurel forests of Madeira, it was formally described as a new species in 2013 by Othmar Breuss. The species epithet honours German lichenologist Robert Lücking.
Calopadia granulosa is a species of corticolous (bark-dwelling), crustose lichen in the family Pilocarpaceae. Found in Brazil, it was formally described as a new species in 2014 by lichenologists André Aptroot and Marcela Cáceres. The type specimen was collected by the authors from the Parque Natural Municipal de Porto Velho (Rondônia), where it was found growing on the smooth bark of a tree in a park near a rainforest. The thallus of the lichen consists of a crust of pale greyish-green granules that lacks a prothallus. Its ascospores, which number one per ascus, are hyaline, ellipsoid, and muriform. They measure 33–38 by 10.5–13.0 μm; these are among the smallest ascospores found in the genus Calopadia.
Catillaria gilbertii is a rare species of saxicolous (rock-dwelling), crustose lichen in the family Catillariaceae. It is found in the Central Highlands of Scotland.
Hypogymnia pruinoidea is a species of foliose lichen in the family Parmeliaceae. Found in China, it was formally described as a new species in 2012 by Xin-Li Wei and Jiang-Chun Wei. The type specimen was collected from Mt. Taibaishan (Shaanxi) at an elevation of 2,800 m (9,200 ft), where it was found growing on the trunk of Abies. It is only known to occur at this location, a cool and moist montane environment supporting lichen-rich forests and woodlands. The species epithet refers to the pruinose upper thallus surface and lobe tips.
Trichothelium longisetum is a little-known species of wood-dwelling, crustose lichen in the family Trichotheliaceae. Found in northeastern Ecuador, it was formally described as a new species by lichenologists Patrick M. McCarthy and Zdeněk Palice in 2003. The species epithet longisetum refers to the long, narrow setae that characterize this species.
Tricharia duotela is a species of foliicolous (leaf-dwelling) lichen in the family Gomphillaceae. It is characterized by its pale greenish-grey to white color, small ascospores, and preference for open habitats. Found in South Florida, it can be found on the leaves of saw palmetto in pine barrens. This lichen is similar to other species in the genus Tricharia, but it is differentiated by its smaller ascospores and unique diahyphae.
