''Thelidium'' is a genus of

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.fungi in the family

Verrucariaceae The Verrucariaceae are a family of mostly lichenised fungi in the order Verrucariales. The lichen-forming species, which comprise the vast majority of the family, have a wide variety of thallus forms, and include crustose (crust-like), foliose ( ...

. 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 1855 by Italian lichenologist

Abramo Bartolommeo Massalongo Abramo Bartolommeo Massalongo (13 May 1824 – 25 May 1860) was an Italian paleobotanist and lichenologist. He was born in Tregnago in the Province of Verona and took a great interest in botany as a young man. Massalongo joined the faculty of med ...

, who assigned ''

Thelidium amylaceum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned '' Thelidium amylaceum'' as the type species. Species *'' The ...

'' as the type species.

Species

*''

'' *''

Thelidium carbonaceum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' – Australia *''

Thelidium chibaense ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' – Japan *''

Thelidium decipiens ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium fontigenum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium fumidum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium heardense ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium helveticum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium impressum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium incavatum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium izuense ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' – Japan *''

Thelidium litorale ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned '' Thelidium amylaceum'' as the type species In zoological n ...

'' *''

Thelidium luchunense ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' – China *''

Thelidium methorium ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *'' Thelidium minimum'' *''

Thelidium minutulum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium nylanderi ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Th ...

'' *''

Thelidium papulare ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Th ...

'' *''

Thelidium pluvium ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Th ...

'' – Europe *'' Thelidium praevalescens'' *''

Thelidium pyrenophorellum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscription (taxonomy), circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the typ ...

'' *'' Thelidium pyrenophorum'' *''

Thelidium rimosulum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Th ...

'' – Europe *''

Thelidium robustum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' *''

Thelidium sinense ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Th ...

'' – China *'' Thelidium uvidulum'' – Nepal *''

Thelidium yunnanum ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

'' – China *''

Thelidium zwackhii ''Thelidium'' is a genus of lichen-forming fungi in the family Verrucariaceae. The genus was circumscribed in 1855 by Italian lichenologist Abramo Bartolommeo Massalongo, who assigned ''Thelidium amylaceum'' as the type species. Species *''Theli ...

References

Verrucariales Lichen genera Taxa described in 1855 Taxa named by Abramo Bartolommeo Massalongo {{Eurotiomycetes-stub