''Placidiopsis'' 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 Verrucariaceae. 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 ...

by Italian naturalist Francesco Beltramini de Casati in 1858, with '' Placidiopsis grappae'' 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 ...

Species

*'' Placidiopsis cinerascens'' *'' Placidiopsis cavicola'' *'' Placidiopsis cinereoides'' *'' Placidiopsis crassa'' *'' Placidiopsis custnani'' *'' Placidiopsis grappae'' *'' Placidiopsis hamadicola'' *''

Placidiopsis hypothallina ''Placidiopsis'' is a genus of lichens in the family Verrucariaceae. The genus was circumscribed by Italian naturalist Francesco Beltramini de Casati in 1858, with '' Placidiopsis grappae'' assigned as the type species. Species *'' Placidiops ...

'' – Brazil *'' Placidiopsis minor'' *'' Placidiopsis novozelandica'' *'' Placidiopsis oreades'' *'' Placidiopsis parva'' – Australia *''

Placidiopsis poronioides ''Placidiopsis'' is a genus of lichens in the family Verrucariaceae. The genus was circumscribed by Italian naturalist Francesco Beltramini de Casati in 1858, with '' Placidiopsis grappae'' assigned as the type species. Species *'' Placidiops ...

'' – Hong Kong *'' Placidiopsis pseudocinerea'' – Europe *'' Placidiopsis sbarbaronis'' *''

Placidiopsis tiroliensis ''Placidiopsis'' is a genus of lichens in the family Verrucariaceae. The genus was circumscription (taxonomy), circumscribed by Italian naturalist Francesco Beltramini de Casati in 1858, with ''Placidiopsis grappae'' assigned as the type species. ...

'' *''

Placidiopsis tominii ''Placidiopsis'' is a genus of lichens in the family Verrucariaceae. The genus was circumscribed by Italian naturalist Francesco Beltramini de Casati in 1858, with '' Placidiopsis grappae'' assigned as the type species In zoological nomencla ...

References

Verrucariales Lichen genera Eurotiomycetes genera Taxa described in 1858 {{Eurotiomycetes-stub