''Sedelnikovaea'' 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 placodioid lichens in the family

Lecanoraceae The Lecanoraceae are a family of lichenized fungi in the order Lecanorales. Species of this family have a widespread distribution. Taxonomy Lecanoraceae was circumscribed by German lichenologist Gustav Wilhelm Körber in 1855. Genera According ...

. 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 2015 by

Sergey Kondratyuk Sergey Yakovlevich Kondratyuk ( uk, Сергій Якович Кондратюк) (born 17 May 1959) is a Ukrainian botanist specialising in lichenology. His research deals with the taxonomy, floristics, ecology and geography of lichens and lic ...

, Min-Hye Jeong, and Jae-Seoun Hur to contain '' Sedelnikovaea baicalensis'', 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( ...

. Three additional species were transferred into the genus in 2019. ''Sedelnikovaea'' resembles ''

Protoparmeliopsis ''Protoparmeliopsis'' is a genus of crustose lichens in the family Lecanoraceae. It has about 20 species. The genus was circumscribed by French botanist Maurice Choisy in 1929. Species *''Protoparmeliopsis achariana'' *'' Protoparmeliopsis ...

'', and has a

thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or " twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms ...

that is placodioid (

crustose Crustose is a habit of some types of algae and lichens in which the organism grows tightly appressed to a substrate, forming a biological layer. ''Crustose'' adheres very closely to the substrates at all points. ''Crustose'' is found on rocks a ...

at the centre and lobed at the periphery), and

rosette Rosette is the French diminutive of ''rose''. It may refer to: Flower shaped designs * Rosette (award), a mark awarded by an organisation * Rosette (design), a small flower design *hence, various flower-shaped or rotational symmetric forms: ** R ...

-like. It has, however, a unique different

ascus An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera o ...

structure, and it is genetically distinct from ''Protoparmeliopsis''. The genus name honours Russian lichenologist Nellia Vasiljevna Sedelnikova, "in recognition of her contribution to our knowledge of Asian lichen flora".

Species

*'' Sedelnikovaea baicalensis'' *'' Sedelnikovaea marginalis'' *'' Sedelnikovaea pseudogyrophorica'' *'' Sedelnikovaea subdiscrepans''

References

Lecanoraceae Taxa described in 2015 Lecanorales genera Taxa named by Sergey Kondratyuk Taxa named by Jae-Seoun Hur {{Lecanorales-stub