''Redonia'' 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 n ...

of lichenized

fungi A fungus (plural, : fungi or funguses) is any member of the group of Eukaryote, eukaryotic organisms that includes microorganisms such as yeasts and Mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified ...

in the family

Caliciaceae The Caliciaceae are a family of mostly lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. Although the family has had its classification changed several times throughout its taxonomic history, the use of m ...

. It contains the single species ''Redonia chilena'', a

squamulose lichen A squamulose lichen is a lichen that is composed of small, often overlapping "scales" called squamules. If they are raised from the substrate Substrate may refer to: Physical layers *Substrate (biology), the natural environment in which an o ...

. The

type specimen In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the ...

was collected in Tarapacá, Chile, where it was found growing on

calcareous soil Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adj ...

. 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 po ...

in 1973 by

Carroll William Dodge Carroll William Dodge (January 20, 1895 – July 21, 1988) was an American mycologist and lichenologist. His major fields of study included human and mammalian parasitic fungi, lichen-associated fungi, and fungi forming subterranean sporophores ...

. The genus name honours Jorge Redón Figueroa, a Chilean lichenologist who collected the type. In his original circumscription of the genus, Dodge included the species ''Redonia cladocarpiza'' (transferred from ''

Buellia ''Buellia'' is a genus of mostly lichen-forming fungi in the family Caliciaceae. The fungi are usually part of a crustose lichen. In this case, the lichen species is given the same name as the fungus. But members may also grow as parasites on l ...

''), but this species is now known as '' Tetramelas cladocarpizus''.

References

Teloschistales Lichen genera Caliciales genera Taxa described in 1973 Taxa named by Carroll William Dodge {{Teloschistales-stub