| Name | Clavascidium Breuss |
| Authorship | Breuss |
| Rank | Genus |
| Placed in | Verrucariaceae |
| Contains | Clavascidium lacinulatum (Acharius) M. Prieto Clavascidium sp. |
| Remarks | Type: C. umbrinum (Breuss) Breuss (Catapyrenum umbrinum Breuss) |
| Citation | 1996 Ann. Naturhist. Mus. Wien, B 98(Suppl.): 41 |