''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 ...

lichenicolous A lichenicolous fungus is a parasitic fungus that only lives on lichen as the host. A lichenicolous fungus is not the same as the fungus that is the component of the lichen, which is known as a lichenized fungus. They are most commonly specific to ...

(

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 Verrucariales is an order of ascomycetous fungi within the subclass Chaetothyriomycetidae of the class Eurotiomycetes. Although most of the Verrucariales are lichenised, the family Sarcopyreniaceae consists of 11 species of lichenicolous (liche ...

. 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 Friedrich (or Friederich) Wilhelm Zopf (12 December 1846 – 24 June 1909) was a well-known German botanist and mycologist. He dedicated to his whole life with fungal biology, particularly in classification of fungi and dye production in fungi an ...

Species

Species Fungorum ''Index Fungorum'' is an international project to index all formal names (scientific names) in the fungus kingdom. the project is based at the Royal Botanic Gardens, Kew, one of three partners along with Landcare Research and the Institute of Mi ...

(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'' * '' Merismatium corae'' – host: '' Cora'' * '' Merismatium deminutum'' – hosts: '' Polyblastia'', ''

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'', ''

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'', ''

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 ''Lichenomphalia'' is both a basidiolichen and an agaric genus. Most of the species have inconspicuous lichenized thalli that consist of scattered, small, loose, nearly microscopic green balls or foliose small flakes containing single-celled gree ...

'', ''

Lopadium Ulubad or Uluabat, in the Byzantine period Lopadion ( grc, Λοπάδιον), Latinized as Lopadium, is a settlement near the town of Karacabey in the Bursa Province of northwestern Turkey. It was sited on the ancient Miletouteichos. History Ul ...

'', '' Micarea'', '' Mycobilimbia'', ''

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 ''Rimularia'' is a genus of lichenized fungi in the family Trapeliaceae. ''Rimularia'' was circumscribed by Finnish botanist William Nylander in 1868. Species *'' Rimularia actinostoma'' *'' Rimularia albotessellata'' *'' Rimularia applanata'' ...

'' * '' 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