Malacocarpus kovaricii Frič in Ceskoslov. Zahradn. Listy 1924: 31. 1924
Malacocarpus kovaricii in Ceskoslov. Zahradn. Listy 1924: 31. 1924
is basionym for Notocactus kovaricii in Repert. Pl. Succ. 41: 11. 1990
is basionym for Notocactus neoarechavaletae f. kovaricii in Minimus 30: 29. 1999
is basionym for Wigginsia kovaricii, Kakteenlex.: 223. 1966
is basionym for Notocactus neoarechavaletae var. kovaricii in Repert. Pl. Succ. 41: 11. 1990