''Merismatium'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of lichenicolous (

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...

of uncertain familial placement in the order Verrucariales. The genus was

circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ...

in 1898 by Friedrich Wilhelm Zopf.

Species

, Species Fungorum (in the

Catalogue of Life The Catalogue of Life is an online database that provides an index of known species of animals, plants, fungi, and microorganisms. It was created in 2001 as a partnership between the global Species 2000 and the American Integrated Taxonomic Info ...

) accepts six species of ''Merismatium''.

Host A host is a person responsible for guests at an event or for providing hospitality during it. Host may also refer to: Places * Host, Pennsylvania, a village in Berks County People *Jim Host (born 1937), American businessman * Michel Host ...

information is from Diederich et al. (2018). * '' Merismatium coccotremicola'' – host: ''

Coccotrema ''Coccotrema'' is a genus of lichen-forming fungi. It is the type genus of the family Coccotremataceae, in the order Pertusariales. The genus contains 16 species. Taxonomy ''Coccotrema'' was circumscribed by Swiss botanist Johannes Müller Argov ...

'' * '' Merismatium corae'' – host: ''

Cora Cora may refer to: Science * ''Cora'' (fungus), a genus of lichens * ''Cora'' (damselfly), a genus of damselflies * CorA metal ion transporter, a Mg2+ influx system People * Cora (name), a given name and surname * Cora E. (born 1968), German hi ...

'' * '' Merismatium deminutum'' – hosts: ''

Polyblastia ''Polyblastia'' is a genus of lichenized fungi in the family Verrucariaceae. As of 2020, it consists of about 40 species combined with about 50 orphaned species. The main difference with the genus ''Verrucaria'' is related to spores, which are mur ...

'', ''

Staurothele ''Staurothele'' is a genus of saxicolous lichen, saxicolous (rock-dwelling), crustose lichens in the family Verrucariaceae. It has about 40 species. When the fungus is part of a lichen, the genus of lichen is List of common names of lichen gener ...

'', ''

Thelidium ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned '' Thelidium amylaceum'' as the type species In zoological n ...

'', ''

Verrucaria ''Verrucaria'' is a genus of lichenized (lichen-forming) fungi in the family Verrucariaceae. Taxonomy The genus was circumscribed by German botanist Heinrich Adolph Schrader in 1794, with '' Verrucaria rupestris'' assigned as the type species. I ...

'' * '' Merismatium nigritellum'' – hosts: ''

Catapyrenium ''Catapyrenium'' is a genus of lichens in the family Verrucariaceae. The genus was circumscribed by German botanist Julius von Flotow Julius von Flotow; full name- Julius Christian Gottlieb Ulrich Gustav Georg Adam Ernst Friedrich von Flotow (9 ...

'', ''

Leptogium ''Leptogium'' is a genus of lichen-forming fungi in the family Collemataceae. It has about 110 species. Species *'' Leptogium acadiense'' *'' Leptogium adnatum'' – South America *''Leptogium andegavense'' *'' Leptogium antarcticum'' *''L ...

'', '' Lichenomphalia'', '' Lopadium'', ''

Micarea ''Micarea'' is a genus of lichenized fungi in the family Pilocarpaceae. The widely distributed genus contains 126 species and new species are described actively. Species in the genus are crustose lichens and their photobiont (the non-fungal organ ...

'', ''

Mycobilimbia ''Mycobilimbia'' is a genus of lichens in the family Lecideaceae The Lecideaceae are a family of lichens in the order Lecideales (Ascomycota, class Lecanoromycetes). Genera According to a recent (2022) estimate, the Lecideaceae comprise 29 ge ...

'', ''

Ochrolechia ''Ochrolechia'' is a genus of crustose lichens in the family Ochrolechiaceae. Species , Species Fungorum accepts 38 species of ''Ochrolechia'': *'' Ochrolechia aegaea'' *'' Ochrolechia africana'' *'' Ochrolechia alaskana'' *'' Ochrolechia a ...

'', ''

Protoblastenia ''Protoblastenia'' is a genus of lichens in the family Psoraceae. It was originally circumscribed by Alexander Zahlbruckner in 1908 as a section Section, Sectioning or Sectioned may refer to: Arts, entertainment and media * Section (music), ...

'' * '' Merismatium peregrinum'' – host: '' Rimularia'' * '' Merismatium thamnoliicola'' – host: ''

Thamnolia ''Thamnolia'' is a genus of lichens in the family Icmadophilaceae. Members of the genus are commonly called whiteworm lichens. Two species of ''Thamnolia'' are used by ethnic peoples of Yunnan Province Yunnan , () is a landlocked pro ...

References

Verrucariales Eurotiomycetes genera Taxa named by Friedrich Wilhelm Zopf Taxa described in 1898 Lichenicolous fungi {{Eurotiomycetes-stub