This name is a synonym of Myrtillocactus geometrizans (Mart. ex Pfeiff.) Console.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 5102340) with original publication details: Cactaceae 4: 3267 1960.
This name was in version 1 of The Plant List, record tro-5102340, and has not been changed.