The Lecanoraceae are a family of lichenized fungi in the order Lecanorales. Species of this family have a widespread distribution.
The Physciaceae are a family of mostly lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. A 2016 estimate placed 19 genera and 601 species in the family.
The Baeomycetales are an order of mostly lichen-forming fungi in the subclass Ostropomycetidae, in the class Lecanoromycetes. It contains 8 families, 33 genera and about 170 species. As a result of molecular phylogenetics research published in the late 2010s, several orders were folded into the Baeomycetales, resulting in a substantial increase in the number of taxa.
Lopadium is a genus of lichen-forming fungi in the monotypic family Lopadiaceae, which is in the order Lecideales. The genus contains 10 species. Lopadium was circumscribed by German lichenologist Gustav Wilhelm Körber in 1855.
Anaptychia is a genus of lichen-forming fungi in the family Physciaceae. Anaptychia species are foliose (leafy) to fruticose (bushy) lichens. They have brown, thin-walled spores with a single septum, and a prosoplechtenchymatous upper cortex.
Physconia is a genus of lichen-forming fungi in the family Physciaceae. It has about 25 species. The genus was circumscribed by Czech lichenologist Josef Poelt in 1965, with Physconia pulverulenta assigned as the type species.
Phaeophyscia is a genus of lichen-forming fungi in the family Physciaceae.
Seirophora is a genus of lichen-forming fungi in the family Teloschistaceae. It has eight species. The genus was circumscribed by German lichenologist Josef Poelt in 1983, with Seirophora magara assigned as the type species. Several species were transferred to Seirophora in 2004 when the genus was emended by Patrik Frödén and Per Lassen to include some species segregated from Teloschistes.
Bryonora is a genus of lichen-forming fungi in the family Lecanoraceae. These lichens typically grow on soil, mosses, plant debris, or rocks in arctic or alpine environments. The genus was circumscribed in 1983 by lichenologist Josef Poelt, with Bryonora castanea assigned as the type species.
Sagema is a fungal genus in the family Lecanoraceae. It is a monotypic genus, containing a single species, the crustose lichen Sagema potentillae, found in Nepal. Both the genus and species were described in 1993 by lichenologists Josef Poelt and Martin Grube.
Candelariaceae is a family of lichen-forming fungi in the order Candelariales. It contains seven genera and about 73 species.
Peltula is a genus of small dark brown to olive or dark grey squamulose lichens. These lichens typically grow on rocks in arid and semi-arid environments worldwide. They consist of a fungus living in symbiosis with a photosynthetic partner, specifically a cyanobacterium of the genus Chroococcidiopsis. Peltula is the only genus in the family Peltulaceae, which belongs to the Lichinomycetes, a class of fungi that form lichens. The genus includes about 50 recognised species, which exhibit a variety of growth forms ranging from flat and crust-like to more complex, leaf-like structures. Peltula lichens play important ecological roles in harsh environments, contributing to soil stability and nutrient cycling.
Rhizocarpon is a genus of crustose, saxicolous, lecideoid lichens in the family Rhizocarpaceae. The genus is common in arctic-alpine environments, but also occurs throughout temperate, subtropical, and even tropical regions. They are commonly known as map lichens because of the prothallus forming border-like bands between colonies in some species, like the common map lichen.
Squamarina is a genus of lichens in the family Stereocaulaceae. They form patches of radiating lobes or overlapping scales, with a well-developed upper cortex and no lower cortex. They grow on calcareous soil and rocks. Squamarina lentigera can be used to make a yellow dye.
Malmideaceae is a family of crustose and corticolous lichens in the order Lecanorales. It contains eight genera and about 70 species.
Peter Wilfred James (1930–2014) was an English botanist and lichenologist. He was a pioneer in the study of lichens as environmental indicators, especially of atmospheric pollution.
Arthrorhaphis is a genus of lichen-forming fungi in the monotypic family Arthrorhaphidaceae. It has 13 species. The genus was circumscribed by Theodor Magnus Fries in 1860. The family was proposed by lichenologists Josef Poelt and Josef Hafellner in 1976. Species in this family have a widespread distribution in temperate and montane habitats. They grow symbiotically with green algae, or parasitically on other lichens. The family Arthrorhaphidaceae has an uncertain taxonomic placement in the class Lecanoromycetes; that is, it is incertae sedis with respect to ordinal placement.
Flavoplaca is a genus of crust-like or scaly lichens in the family Teloschistaceae. It has 28 species with a mostly Northern Hemisphere distribution.
Apatoplaca is a fungal genus in the family Teloschistaceae. It is monotypic, containing a single species, the rare crustose lichen Apatoplaca oblongula, found in the United States.
Josef Poelt was a botanist, bryologist and lichenologist. He held the chair in Systematic Botany and Plant Geography at the Free University of Berlin and then was head of the Botanical Institute and Botanical Garden of Graz University, Austria.
