''Canoparmelia subroseoreagens'' is a species of

foliose lichen Foliose lichen is one of the morphological classes of lichens, which are complex organisms that arise from the symbiotic relationship between fungi and a photosynthetic partner, typically algae. This partnership allows lichen to live in diverse ...

in the family

Parmeliaceae The Parmeliaceae is a large and diverse family of Lecanoromycetes. With over 2700 species in 71 genera, it is the largest family of lichen-forming fungi. The most speciose genera in the family are the well-known groups: '' Xanthoparmelia'' ( 822 ...

. Found in Brazil, it was formally described as a new species in 2009 by lichenologists Marcelo Marcelli, Luciana da Silva Canêz, and John Elix. The

type specimen In biology, a type is a particular wiktionary:en:specimen, 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 a ...

was collected from a

Brazilian pine ''Araucaria angustifolia'', the Paraná pine, Brazilian pine or candelabra tree (, or ), is a critically endangered species in the conifer genus ''Araucaria''. Although the common names in various languages refer to the species as a "pine", it do ...

forest in Fazenda da Estrela (

Vacaria Vacaria is a municipality in the northeast of the southern Brazilian state of Rio Grande do Sul. It is located at a latitude of 28° 30' 44" South and a longitude of 50° 56' 02" west, with an altitude of 971 meters. Its population in 2020 was ...

Rio Grande do Sul Rio Grande do Sul (, , ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative_units_of_Brazil#List, fifth-most-populous state and the List of Brazilian st ...

) at an altitude of , where it was found growing on tree bark. The lichen is named for its similarity to '' Canoparmelia roseoreagens'' (found in the same locality) but that species produces

isidia An isidium is a vegetative reproductive structure present in some lichens. Isidia are outgrowths of the thallus surface, and are corticated (i.e., containing the outermost layer of the thallus), usually with a columnar structure, and consisting o ...

rather than soredia. ''Canoparmelia subroseoreagens'' is identifiable by its upper surface that is deeply cracked. Most of the soredia on this lichen grow from the raised edges of the cracks and create round, indented structures that look like open pustules. This lichen has a distinctive chemical composition that includes olivetolcarboxylic acid, which turns pink when treated with the C (

calcium hypochlorite Calcium hypochlorite is an inorganic compound with formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent. Thi ...

) chemical spot test. Additionally, this lichen produces many meta-

depside A depside is a type of polyphenolic compound composed of two or more monocyclic aromatic units linked by an ester bond. Depsides are most often found in lichens, but have also been isolated from higher plants, including species of the Ericaceae, L ...

compounds whose properties are unknown.

References

Parmeliaceae Lichen species Lichens described in 2009 Lichens of Brazil Taxa named by John Alan Elix {{Parmeliaceae-stub