External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:149645-2
- Publication
- Monatsschrift für Kakteenkunde. Berlin
- Collation
- 4: 143
- Family as entered in IPNI
- Cactaceae
Links
- Nomenclatural link
- Echinocactus tetracanthus Lem.
- Same citation as
- Malacocarpus tetracanthus (Lemaire) Rud.Mey.
- Same citation as
- Malacocarpus tetracanthus (Lem.) Rud.Mey., Monatsschr. Kakteenk. 1894, iv. 143.