| 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 |
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