Lecanora is a genus of lichen commonly called rim lichens. Lichens in the genus Squamarina are also called rim lichens. Members of the genus have roughly circular fruiting discs (apothecia) with rims that have photosynthetic tissue similar to that of the nonfruiting part of the lichen body (thallus). Other lichens with apothecia having margins made of thallus-like tissue are called lecanorine.
Lecanora muralis(Protoparmeliopsis muralis) is a waxy looking, pale yellowish green crustose lichen that usually grows in rosettes radiating from a center (placodioid) filled with disc-like yellowish-tan fruiting bodies (apothecia). It grows all over the world. It is extremely variable in its characteristics as a single taxon, and may represent a complex of species. The fruiting body parts have rims of tissue similar to that of the main nonfruiting body (thallus), which is called being lecanorine. It is paler and greener than L. mellea, and more yellow than L. sierrae. In California, it may be the most common member of the Lecanora genus found growing on rocks (saxicolous).
Lecanora laxa is a species of lichen in the family Lecanoraceae.
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.
Lecanora shangrilaensis is a species of crustose lichen in the family Lecanoraceae. Found in southwestern China, it was described as a new species in 2017 by Zun-Tian Zhao and Lei Lü. The type collection was made in Shangri-La county, at an altitude of 3,500 metres (11,500 ft); here the lichen was found growing on pinecones. The specific epithet, shangrilaensis, refers to the type locality.
Lecanora solaris is a species of crustose lichen in the family Lecanoraceae. Found in the Altai Mountains in Russia, the lichen was described as new to science in 2019 by Lydia Yakovchenko and Evgeny Davydov. The lichen is similar in general morphology to Lecanora somervellii, but can be distinguished from that species by its small, squamulose (scaly) to marginally lobate umbilicate thallus and the persistent margin of its apothecia. The species epithet makes reference to the bright yellow colour of the lichen.
Lecanora kohu is a species of lichen in the family Lecanoraceae. Found in the Chatham Islands of New Zealand, it was formally described as new to science in 2017.
Loxospora ochrophaea is a species of crustose lichen in the family Sarrameanaceae.
Hypogymnia flavida is a species of foliose lichen in the family Parmeliaceae. It is found in mountainous locations of east Asia, where it grows on the bark and wood of woody plants. It has a relatively large yellowish thallus.
Psiloparmelia salazinica is a species of foliose lichen in the family Parmeliaceae. It is found in South America.
Lecanora lichexanthona is a species of crustose and saxicolous (rock-dwelling) lichen in the family Lecanoraceae. Found in Brazil, it was formally described as a new species in 2000 by lichenologist Roland Guderley. The type specimen was collected by Klaus Kalb in a closed cerradão between Rio Verde de Mato Grosso and Coxim where it was found growing on siliceous rock. The specific epithet lichexanthona refers to the presence of the chemical lichexanthone as a major secondary in the lichen. Other compounds in the lichen are atranorin, hybocarpone, constipatic acid, and norlichexanthone. Lecanora lichexanthona is only known to occur in cerradão formations in central Brazil, at altitudes between 500 and 850 m.
Lecanora luteomarginata is a species of saxicolous (rock-dwelling) and crustose lichen in the family Lecanoraceae. Found in India, it was formally described as a new species in 2006 by Sanjeeva Nayaka, Dalip Kumar Upreti, and H. Thorsten Lumbsch. The type specimen was collected in the trail from Gaurikund to Rambara in the valley of the Mandakini River at an elevation ranging from between 1,980 and 2,800 m. It is only known from the type locality. Characteristics of the lichen include its thin, smooth thallus, dark brown apothecia with bright yellow margins, melacarpella-type amphithecia and glabrata-type epihymenia. The specific epithet luteomarginata refers to the yellow-coloured apothecial margins. Secondary compounds in the lichen include arthothelin, atranorin, chloroatranorin, and thiophanic acid.
Lecanora loekoesii is a species of corticolous (bark-dwelling), crustose lichen in the family Lecanoraceae. Found in South Korea, it was formally described as a new species in 2011 by Lei Lü, Yogesh Joshi, and Jae-Seoun Hur. The type specimen was collected on Mount Taebaek at an altitude of 910 m (2,990 ft); here it was found growing on oak bark. It is only known to occur at the type locality. The specific epithet loekoesii honours Hungarian lichenologist László Lőkös, who collected the type specimen.
Lecanora hafelliana is a species of corticolous (bark-dwelling), crustose lichen in the family Lecanoraceae. It is found in South Korea and in China, where it is fairly common on the bark of deciduous trees such as maple, birch, dogwood, and oak. The lichen was formally described as a new species in 2011 by Lei Lü, Yogesh Joshi, and Jae-Seoun Hur. The type specimen was collected by Hur on Mount Baekwoon at an elevation of 1,037 m (3,402 ft). In China, it was recorded growing on the bark of Korean pine. The lichen has a dull whitish to ash-grey crust-like thallus with a definite margin, but lacking a prothallus. Lecanora hafelliana contains several secondary compounds, including atranorin, zeorin, usnic acid, a complex of compounds related to stictic acid, and hafellic acid. Its specific epithet alludes to the presence of this latter compound.
Lecanora microloba is a species of crustose and areolate lichen in the family Lecanoraceae. Found in Poland, it was formally described as a new species in 2010 by Lucyna Śliwa and Adam Flakus. The type specimen was found by the second author in the Hińczowy Żleb gully in the High Tatra Mountains at an altitude of 2,200 m (7,200 ft). Here, in vegetation characteristic of the subnival belt, the lichen was found growing on granite rock that was mylonitized. Lecanora microloba contains secondary compounds: gyrophoric acid, usnic acid, and zeorin as major metabolites, and an unidentified terpene. A distinguishing characteristic of the lichen is the presence of coarse granules in the epithecium that are distinctly bright when shone with polarized light. The specific epithet microloba refers to the minute lobe-like areoles in the thallus margins.
Lecanora austrae-frigidae is a rare species of lignicolous (wood-dwelling) and crustose lichen in the family Lecanoraceae. Found in Antarctica, it was formally described as a new species in 2009 by Norwegian lichenologist Dag Øvstedal. The type specimen was collected from Deception Island. Here it was found growing on the imported timber of a decrepit whaling station. The lichen has a pale yellow-green, crustose thallus up to 2–3 cm (0.8–1.2 in) wide and up to 0.3 mm thick. The apothecia start out immersed in the thallus, but later become sessile; they are up to 0.7 mm wide with a flat, orange-brown disc. No mature ascospores were detected in the type specimen. Several lichen products are found in Lecanora austrae-frigidae: arthothelin is a major metabolite, while minor compounds include atranorin, lichexanthone, and several chlorinated derivatives of both lichexanthone and norlichexanthone.
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.
Lecanora panticapaensis is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecanoraceae. It occurs in a single locality in Dnipropetrovsk Oblast, Ukraine, where it grows on the vertical surfaces of black schist beside a river.
Lecanora lojkahugoi is a species of saxicolous (rock-dwelling) crustose lichen in the family Lecanoraceae. It is found in the Russian Far East and in South Korea.
Xanthoparmelia perezdepazii is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. It is found in the Canary Islands.
