| Name | Arthothelium mesoleucum (Nylander) Müller Arg. |
| Authorship | (Nylander) Müller Arg. |
| Rank | Species |
| Placed in | Arthothelium A. Massalongo |
| GUID | urn:lsid:indexfungorum.org:names:377392 |
| Citation | 1894 Bull. Herb. Boissier 2: 736 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Arthothelium mesoleucum (Nylander) Müller Arg. |
| Identification made in | [no date] (4) |