| Name | Willeya Müller Arg. | 
| Authorship | Müller Arg. | 
| Rank | Genus | 
| Placed in | Verrucariaceae | 
| Contains | Willeya diffractella (Nylander) Müller Arg. Willeya sp. | 
| Remarks | Type: W. diffractella (Nylander) Müller Arg. (Verrucaria diffractella Nylander) | 
| Citation | 1883 [1 Aug 1883] Flora 66(22): 345 | 
