Verrucaria is a large genus of lichens in the family Verrucariaceae., Species Fungorum (in the Catalog of Life) accepts 149 species in the genus. Historically, many more taxa than this have been placed in genus Verrucaria at some time in their taxonomic history. For example, the nomenclatural authority Index Fungorum has 4127 taxa with the genus name Verrucaria, including species, varieties, and forms.