''Ainoa'' 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 lichens in the family Baeomycetaceae. The genus contains two species: '' A. mooreana'', and the type, '' A. geochroa''. 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 2001 by H. Thorsten Lumbsch and Imke Schmitt to contain the two species, which were formerly placed in genus ''

Trapelia ''Trapelia'' is a genus of lichenized fungi in the family Trapeliaceae Trapeliaceae is a family of lichens in the order Baeomycetales. The family contains 12 genera and about 125 species. Taxonomy Trapeliaceae was originally circumscribed ...

''. A third species, '' Ainoa bella'' from eastern North America, was added to the genus in 2015. The genus name of ''Ainoa'' is in honour of Aino Marjatta Henssen (1925–2011), who was a German lichenologist and systematist.

References

Baeomycetales Baeomycetales genera Lichen genera Taxa described in 2001 Taxa named by Helge Thorsten Lumbsch {{Lecanoromycetes-stub