External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:77061595-1
- Species Name
- Notocactus ottonis (Lehm.) A.Berger, Kakteen (Berger) 343 (1929).
- Publication
- Internoto
- Collation
- 25(2): 66
- Date of Publication
- April 2004
- Family as entered in IPNI
- Cactaceae