| Name | Thelidium A. Massalongo |
| Authorship | A. Massalongo |
| Rank | Genus |
| NomenclaturalStatus | NomLeg |
| Placed in | Lichens |
| Contains | Thelidium auruntii (A. Massalongo) Krempelhuber Thelidium farlowii Riddle Thelidium hospitum Arnold Thelidium inaequale C. W. Dodge & G. E. Baker Thelidium microbolum (Tuckerman) Hasse Thelidium minimum (A. Massalongo ex Körber) Arnold Thelidium minutulum Körber Thelidium pyrenophorum (Acharius) Körber Thelidium quinqueseptatum (Nylander) Arnold Thelidium sp. Thelidium viride Eitner |
| Remarks | Lectotype: T. amylaceum (Trevisan) A. Massalongo (Spermatodium amylaceum Trevisan) (vide Clements & Shear, Gen. Fungi 288. Jun-Dec 1931). |
| Citation | 1855 Framm. Lichenogr. 15 |