''Clypeopyrenis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of lichen-forming

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 Pyrenulaceae. 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 1991 by Dutch lichenologist André Aptroot, with '' Clypeopyrenis microsperma'' 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 specime ...

. This lichen, originally described from material collected in Costa Rica, is also found in the Caribbean and South America. '' Clypeopyrenis porinoides'' was added to the genus in 2011; it was discovered in Costa Rica, close to the type locality of the type species.

References

Pyrenulales Eurotiomycetes genera Taxa named by André Aptroot Taxa described in 1991 {{Eurotiomycetes-stub