Diorygma is a genus of lichenized fungi in the family Graphidaceae. The genus was circumscribed by Franz Gerhard Eschweiler in 1824. Species of the genus are widely distributed in tropical and subtropical regions of the world.
Acanthothecis is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed by Frederick Edward Clements in 1909.
Allographa leptospora is a species of script lichen in the family Graphidaceae. The lichen was first formally described in 1921 by Finnish lichenologist Edvard August Vainio as Graphis leptospora. The type specimen was collected in 1904 by German botanist Carl Curt Hosseus on Doi Suthep, where it was found growing on tree bark. Hosseus sent this and other lichens collected from Thailand to Vainio for identification. Robert Lücking and Klaus Kalb transferred it to the genus Allographa in 2018. In 2016, the lichen was reported from the Sintra Mountains, Portugal, which was its first documented occurrence in Europe.
Allographa aptrootiana is a species of script lichen in the family Graphidaceae that is found in tropical Africa. It was formally described as a new species in 2014 by Dries Van den Broeck, Robert Lücking, and Damien Ertz. The type locality is Yaengo (Orientale Province, Democratic Republic of the Congo; here it was found growing on the bark of an unidentified tree species in an evergreen forest. The lichen somewhat resembles Graphis tetralocularis in overall morphology, but unlike that species it has a completely carbonized excipulum, and does not produce the secondary compound atranorin. The holotype specimen is parasitised with Etayoa trypethelii, a widespread tropical lichenicolous fungus. The specific epithet aptrootiana honours André Aptroot, "in recognition of his many contributions to tropical lichenology". The taxon was transferred to Allographa in 2018 following a reinstatement and reorganization of that genus.
Astrochapsa is a genus of lichen-forming fungi in the subfamily Graphidoideae of the family Graphidaceae. It has 28 species. The genus was circumscribed by Sittiporn Parnmen, Robert Lücking, and H. Thorsten Lumbsch in 2012, with Astrochapsa astroidea assigned as the type species. It was segregated from the genus Chapsa, from which it differs in having a more frequently densely corticate thallus, an apothecial margin that is mostly recurved, and the almost exclusively subdistoseptate, non-amyloid ascospores.
Salazinic acid is a depsidone with a lactone ring. It is found in some lichens, and is especially prevalent in Parmotrema and Bulbothrix, where its presence or absence is often used to help classify species in those genera.
Wirthiotrema is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed in 2010 by Eimy Rivas Plata, Klaus Kalb, Andreas Frisch, and H. Thorsten Lumbsch, with Wirthiotrema glaucopallens assigned as the type species. Wirthiotrema contains species that were formerly considered part of the Thelotrema glaucopallens species group. The genus name honours lichenologist Volkmar Wirth, "for his numerous outstanding contributions to lichenology".
Halegrapha is a genus of lichen-forming fungi in the family Graphidaceae. It has nine species. The genus was circumscribed in 2011 by Eimy Rivas Plata and Robert Lücking, with Halegrapha chimaera assigned as the type species. The generic name honors American lichenologist Mason Hale.
Acanthothecis aurantiacodiscus is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from the Kabaragala Tea Estate in Central Province at an altitude of 1,160 m (3,810 ft); here it was growing in semi-exposed, disturbed vegetation. It is only known to occur at the type locality. The specific epithet aurantiacodiscus refers to the orange-coloured disc of the ascomata. Acanthothecis aurantiacodiscus contains the secondary compound norstictic acid. It has relatively large muriform ascospores, measuring 45–50 by 12–15 μm. These last two features distinguish it from most other Acanthothecis species.
Halegrapha masoniana is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from Cottaganga Ella, in a montane forest at an altitude of 1,147 m (3,763 ft). It is only known to occur at the type locality. The specific epithet honours American lichenologist Mason Hale, "for his important contributions to lichenology in Sri Lanka".
Leucodecton canescens is a species of lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from the Maussakanda Tea Estate at an altitude of 1,074 m (3,524 ft). The lichen, which has been recorded from several locations in the Central Province, grows in semi-exposed, disturbed areas at high elevations. The specific epithet canescens refers to the grey-coloured cover of the thallus.
Leucodecton fuscomarginatum is a species of lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from the Kikiliyamana Tea Estate at an altitude of 1,280 m (4,200 ft). The lichen, which is known to occur only at the type locality, grows in disturbed vegetation. The specific epithet fuscomarginatum refers to the rims of the ascomata pores, which are typically brown in colour. Leucodecton fuscomarginatum has a shiny, smooth, light greenish to yellowish brown thallus measuring 50–100 μm thick with a thin cortex. The ascospores are muriform, ellipsoid in shape, and measure 30–40 by 10–12 μm. Secondary chemicals present in the lichen include stictic acid, constictic acid, acetylconstictic acid, and hypostictic acid.
Ocellularia aptrootiana is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from Mahailluppallama at an altitude of 170 m (560 ft). Here, in a low-altitude, dry, semi-evergreen forest, it was found growing around a water tank. The specific epithet aptrootiana honours Dutch lichenologist André Aptroot, "for his important contributions to tropical lichenology and his help with the research by the first author". Ocellularia aptrootiana has a grey, smooth to uneven or cracked thallus up to convert 5 cm (2 in) in diameter. The ascospores are hyaline, ellipsoid in shape, contain seven septa, and measure 20–25 by 6–7 μm. Secondary chemicals present in the lichen include psoromic acid, subpsoromic acid, and 2’-O-demethylpsoromic acids.
Ocellularia balangoda is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from a high-altitude tea estate in Hunnasgiriya at an altitude of 1,240 m (4,070 ft); here it was found growing on tree trunks. The specific epithet refers to the prehistoric hominids known as Balangoda Man, who lived in Sri Lanka about 38,000 to 28,500 years ago. Ocellularia balangoda has a grey thallus up to 5 cm (2 in) in diameter, with a papillose (pimply) to verrucose (warty) textured surface. The ascospores are hyaline, ellipsoid in shape, contain seven septa, and measure 25–30 by 5–7 μm. Secondary chemicals present in the lichen include protocetraric acid and virensic acid.
Ocellularia cloonanii is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from a high-elevation montane forest in the Fishing Hut Tea Estate at an altitude of 1,870 m (6,140 ft). The lichen is only known to occur at the type locality in the Horton Plains. The specific epithet cloonanii honours Colman Patrick Cloonan, "for his immense help in carrying out the research studies". Ocellularia cloonanii has an olive-grey thallus up to 5 cm (2 in) in diameter, with continuous but uneven surface. Its ascospores are hyaline, ellipsoid in shape, contain seven to nine septa, and measure 35–40 by 7–10 μm. Secondary chemicals present in the lichen include psoromic acid, subpsoromic acid, and 2’-O-demethylpsoromic acid.
Ocellularia raveniana is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from a high-elevation tea estate in Matale at an altitude of 1,360 m (4,460 ft). The lichen is only known to occur at the type locality and in the Sabaragamuwa Mountain Range. The specific epithet raveniana honours botanist and environmentalist Peter H. Raven, longtime director and now President Emeritus of the Missouri Botanical Garden. Ocellularia raveniana has a cream-colored to white thallus up to 10 cm (4 in) in diameter, with an uneven to somewhat verrucose (warty) surface. Its ascospores are hyaline, oblong to ellipsoid in shape, contain seven to nine septa, and measure 25–35 by 8–10 μm. Secondary chemicals present in the lichen include protocetraric acid, and virensic acid.
Rhabdodiscus isidiatus is a species of corticolous lichen in the family Graphidaceae. Found in Sri Lanka, it was formally described as a new species in 2014 by lichenologists Gothamie Weerakoon, Robert Lücking, and Helge Thorsten Lumbsch. The type specimen was collected from the Elkaduwa Plantation in Matale at an altitude of 915 m (3,002 ft). The lichen is only known to occur at the type locality, which is a patch of mid-elevation, disturbed montane forest. The specific epithet isidiatus refers to the presence of isidia on the thallus. Rhabdodiscus isidiatus has a cream-colored to white, smooth to uneven thallus up to 5 cm (2 in) in diameter. The ascomata are rounded and prominent, measuring 0.7–1.0 mm in diameter with a 0.3–0.5 mm wide pore and a light brown rim. Its ascospores are hyaline, ellipsoid in shape, contain three thick septa, and measure 12–15 by 5–6 μm. Secondary chemicals present in the lichen include psoromic acid, subpsoromic acid, and 2'-O-demethylpsoromic acid.
Leucodecton coppinsii is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. It is found in lowland forests of Sarawak, Malaysia.
Cruentotrema is a genus of corticolous (bark-dwelling) lichens in the family Graphidaceae. It has seven species.
