Parodia subterranea var. slabana (Halda & Horáček) Romulski in Kaktusy Inne 3: 77. 2006.

Nomenclatural References

• person : Josef Jakob Halda (b.1943) Based on occurrence of standard abbreviation 'Halda' in the authors string.
• person : Ladislav Horáček (b.1959) Based on occurrence of standard abbreviation 'Horáček' in the authors string.
• person : T. Romulski Based on occurrence of standard abbreviation 'Romulski' in the authors string.