Opegrapha is a genus of lichenized fungi in the family Opegraphaceae. Species include:
Taitaia is a single-species fungal genus in the family Gomphillaceae. It was circumscribed in 2018 to contain the species Taitaia aurea, a lichenicolous (lichen-dwelling) fungus. This species is characterized by aggregated ascomata with yellow margins, and salmon-red discs that originate from a single base. It is known only from a few sites in Kenya's tropical lower-mountain forests, where it grows on thalli of the lichen Crocodia.
Opegrapha vulpina is a species of lichenicolous (lichen-eating) fungus in the family Opegraphaceae. It is found in the Czech Republic, Dobruja, Romania, and the Italian Apennine Mountains. It grows parasitically on two species of saxicolous (rock-dwelling), crustose lichens.
Zwackhiomyces polischukii is a species of lichenicolous (lichen-eating) fungus in the family Xanthopyreniaceae. It occurs in Ukraine, where it parasitises the crustose lichens Bacidia fraxinea and B. rubella.
Endococcus hafellneri is a species of lichenicolous (lichen-eating) fungus in the family Verrucariaceae. It is found in North Asia and the Russian Far East, Estonia, and Japan, where it grows on the lobes of the lichens Flavocetraria cucullata and Cetraria islandica.
Opegrapha verseghyklarae is a little-known species of lichenicolous (lichen-eating) fungus in the family Opegraphaceae. It is found in the Russian Far East, where it grows on the thalli and apothecia of the crustose lichen Ochrolechia pallescens.
Plectocarpon galapagoense is a species of lichenicolous fungus in the family Lecanographaceae. Native to the Galápagos Islands, it grows on and within the ascomata and thallus of Sarcographa tricosa, a host lichen species. Although it appears to be a weak parasite, it may cause significant damage to the host lichen's reproductive structures.
Verrucaria viridula is a common and widely distributed species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. Although it is a somewhat morphologically variable species, two persistent distinguishing characteristics are its relatively large perithecia, which are often curved into a beak, and its large ascospores.
Enterographa dokdoensis is a species of saxicolous (rock-dwelling), script lichen in the family Roccellaceae. It occurs in South Korea. The lichen has a thallus that can cover areas up to 5–10 cm in diameter, with a smooth to roughened texture and a green-grey to mauve colour.
Opegrapha physciaria is a species of lichenicolous (lichen-dwelling) fungus in the family Opegraphaceae. It was first formally described as a new species in 1897 by Finnish lichenologist William Nylander, who placed it in the genus Lecidea. David Hawksworth and Brian J. Coppins transferred it to the genus Opegrapha in 1992.
Roccella galapagoensis is a species of fruticose lichen in the family Roccellaceae. It is endemic to the Galápagos Islands.
Arthonia toensbergii is a species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. It occurs in old-growth boreal rainforests in Norway, where it parasitises the lichen Mycoblastus affinis growing on trunks and branches of Norway spruce.
Tremella parmeliarum is a species of lichenicolous (lichen-dwelling) fungus in the family Tremellaceae. Its host is the foliose lichen species Parmotrema reticulatum.
Arthonia darbishirei is a species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. Found on the Galápagos Islands, it was described as new to science in 2003 by Gerhard Follman and Birgit Werner. It was first collected on San Salvador Island in June 1872 during the Hassler Expedition. The fungus grows specifically on the thallus of Roccella nigerrima, a fruticose lichen that is endemic to the Galápagos. The species epithet darbishirei honours the British lichenologist Otto Vernon Darbishire (1870–1934), who initially described the host lichen and made significant contributions to the study of roccellaceous lichens.
Arthonia ingaderiae is a species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. Discovered on the Pacific coast of South America, it was described as new to science in 2003 by Gerhard Follman. The holotype was collected from the Lomas of Paposo, north of Taltal, Chile, at an elevation of about 400 m (1,300 ft) in the lower fog belt. The fungus grows specifically on the thalli of two fruticose lichen species: Ingaderia gracillima and Ingaderia pulcherrima. The species epithet ingaderiae refers to the host genus Ingaderia.
Arthonia prominens is a species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. Discovered on the Pacific coast of Chile, it was described as new to science in 2003 by Gerhard Follman. The holotype was collected in the supralittoral zone between Las Ventanas and Quintero, in the Valparaíso Province of Central Chile, at an elevation of about 10 metres. The fungus grows specifically on the thallus of Ingaderia gracillima, a fruticose lichen. The species epithet prominens refers to the swollen macules (spots) produced on the host's branches where the fungus's fruiting bodies aggregate.
Lecanographa imitans is a rare species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. Found on the Galápagos Islands, it was described as new to science in 2003 by Birgit Werner and Gerhard Follman. The holotype specimen was collected on Baltra Island, north of Santa Cruz Island, in January 1929. The fungus grows specifically on the thallus of Roccella gracilis, a fruticose lichen. The species epithet imitans refers to the potential confusion of its ascomata with the true fructifications of its host lichen.
Opegrapha reinkellae is a species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. Discovered on the Pacific coast of Peru, it was described as new to science in 2003 by Gerhard Follman. The holotype specimen was collected in Peru, possibly from the central region, by A. Winterfeld in the second half of the 19th century. The fungus grows specifically on the thallus of Roccella lirellina, a fruticose lichen. The species epithet reinkellae refers to the genus name Reinkella, which was erroneously applied to the host lichen when its ascomata were mistakenly thought to belong to the lichen itself.
Sigridea labyrinthica is a species of lichenicolous (lichen-dwelling) fungus in the family Arthoniaceae. Discovered on the Pacific coast of Chile, it was formally described as a new species in 2003 by Gerhard Follman, who first classified it in the genus Plectocarpon. Damien Ertz and Paul Diederich transferred it to the genus Sigridea in 2005. The holotype was collected at Punta Caraumilla, Bahia Laguna Verde, southwest of Valparaíso, on September 15, 1968, by Otto Zöllner Schorr. The fungus grows specifically on the thallus of Roccella portentosa, a fruticose lichen commonly found along the rocky Pacific coast. The species epithet labyrinthicum refers to the maze-like appearance of its gall-forming ascomata.
