| Name | Porostereum crassum (Léveillé) Hjortstam & Ryvarden |
| Authorship | (Léveillé) Hjortstam & Ryvarden |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Porostereum Pilát |
| Citation | 1990 Syn. Fungorum 4: 29 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Porostereum crassum (Léveillé) Hjortstam & Ryvarden |
| Identification made in | 2013 (1) |
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