| Name | Melocactus macracanthos (Salm-Dyck) Link & Otto |
| Authorship | (Salm-Dyck) Link & Otto |
| Rank | Species |
| Placed in | Melocactus |
| Citation | 1827 Verh. Vereins Beford. Gartenbaues Konigl. Preuss. Staaten 3: 418–419 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Melocactus macracanthos (Salm-Dyck) Link & Otto |
| Identification made in | [no date] (1) |