Melocactus onychacanthus F.Ritter
, Succulenta (Netherlands) 46: 40 (1967).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:302707-2
- Publication
- Succulenta; Nederlandsche Vereeniging van Liefhebbers van Cactussen en andere Vetplanten. Huizum, etc.
- Collation
- 46: 40
- Family as entered in IPNI
- Cactaceae