Regarded by many as a form of Aylostera nigricans. Considered to be distinct enough to be given specific status by Mosti & Papini (2011). Stated by Rausch to be like Aylostera (Digitorebutia) brachyantha in habit but for its tiny flowers which do not open fully, barely 15m wide. Named after Carmen Rosa Estrada at the University of Salta.
The original description is here.
Plants of this species in the collection include:
Aylostera carmeniana WR690