| Name | Giacomia Vizzini & Contu |
| Authorship | Vizzini & Contu |
| Rank | Genus |
| Placed in | Tricholomataceae |
| Contains | Giacomia sp. |
| Remarks | Eponymy: named in honour of Abbé Giacomo Bresadola, eminent Italian mycologist, and father of the species name. Type Species: Giacomia mirabilis (Bresàdola) Vizzini & Contu (Tricholoma mirabile Bresàdola) |
| Citation | 2012 Mycosphere 3(1): 84 |