''Harpidium'' 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 ...

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 ...

in the family

Harpidiaceae Harpidiaceae is a small family of lichen-forming fungi, containing two genera and five species. It is of uncertain classification in the Pezizomycotina. Taxonomy The Harpidiaceae was first informally proposed by Antonín Vězda in 1974 to conta ...

. The genus contains three species. ''Harpidium'' 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 1855 by German lichenologist

Gustav Wilhelm Körber Gustav Wilhelm Körber (10 January 1817, Hirschberg – 27 January 1885, Breslau) was a German lichenologist. He studied natural sciences in Breslau and Berlin, obtaining his PhD in 1839 with the thesis ''De gonidiis lichenum''. After graduati ...

, with '' Harpidium rutilans'' assigned as the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...

Species

* ''

Harpidium gavilaniae ''Harpidium'' is a genus of lichen-forming fungi in the family Harpidiaceae. The genus contains three species. ''Harpidium'' was circumscribed in 1855 by German lichenologist Gustav Wilhelm Körber, with '' Harpidium rutilans'' assigned as the ty ...

'' * '' Harpidium longisporum'' * '' Harpidium nashii'' * '' Harpidium rutilans'' The

taxon In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular nam ...

''Harpidium glaucophanum'' is now known as ''

Rhizoplaca glaucophana ''Rhizoplaca'' is a genus of lichenized fungi in the family Lecanoraceae. Members of the genus are commonly called rimmed navel lichens because of their umbilicate growth form and lecanorine (rimmed with thallus-like tissue)apothecia An as ...

''.

References

Pezizomycotina Ascomycota genera Lichen genera Taxa described in 1855 Taxa named by Gustav Wilhelm Körber {{Ascomycota-stub