The Lecanoraceae are a family of lichenized fungi in the order Lecanorales. Species of this family have a widespread distribution.
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 crustose lichens in the family Lecanoraceae. 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.
Protoblastenia is a genus of lichens in the family Psoraceae. It was originally circumscribed by Alexander Zahlbruckner in 1908 as a section of genus Blastenia. J. Steiner promoted it to generic status in 1911.
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.
Malmideaceae is a family of crustose and corticolous lichens in the order Lecanorales. It contains eight genera and about 70 species.
Josef Hafellner is an Austrian mycologist and lichenologist. He was awarded the Acharius Medal in 2016 for his lifetime contributions to lichenology. Before his retirement, he was a professor at the Karl-Franzens-Universität in Graz. Hafellner started developing an interest in lichens while he was a student at this institution, studying under Josef Poelt. He earned a master's degree in 1975 and a PhD in 1978, defending a doctoral thesis about the genus Karschia. In 2003, Hafellner received his habilitation. By this time, he had studied with French lichenologist André Bellemère (1927–2014) at Saint-Cloud, where he learned techniques of transmission electron microscopy and how their application in studying asci could be used in lichen systematics. His 1984 work Studien in Richtung einer natürlicheren Gliederung der Sammelfamilien Lecanoraceae und Lecideaceae has been described as "probably the single most influential publication in lichen systematics in the latter half of the 20th century".
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.
Vezdaea is a genus of crustose lichens in the monotypic family Vezdaeaceae, which itself is the only taxon in the order Vezdaeales. The genus was circumscribed by Elisabeth Tschermak-Woess and Josef Poelt in 1976. The genus name honours Czech lichenologist Antonín Vězda (1920-2008).
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.
Scoliciosporum is a genus of lichens in the family Scoliciosporaceae.
Pachyascus is the sole genus in the family Pachyascaceae. It contains a single species, the lichen Pachyascus lapponicus. Both the genus and species were described as new to science in 1968 by lichenologists Josef Poelt and Hannes Hertel. P. lapponicus was originally collected from Lapland, a province in northern Sweden. The lichen has several unusual characteristics: it grows exclusively along with the rock moss Andreaea, it bears goniocyst-like parts and produces tiny apothecia that stand in the leaf axils of the moss, and it has thick asci.
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.
Sphaeropezia is a genus of fungi in the family Odontotremataceae. It has 22 species. Originally circumscribed by Pier Andrea Saccardo in 1884, the genus was resurrected and revised in 2013.
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.
Martinjahnsia is a single-species fungal genus in the family Teloschistaceae. It contains the sole species Martinjahnsia resendei, a saxicolous (rock-dwelling) crustose lichen.
