Pseudolobivia longispina var. nigra (Backeb.) Backeb., Cactaceae 2: 1344. 1959 Pseudolobivia longispina var. nigra (Backeb.) Backeb., Cactaceae 2: 1344. 1959is new combination for Echinopsis nigra Backeb., Kaktus-ABC: 221. 1936 ["1935"]Taxon for this namePseudolobivia longispina var. nigra (Backeb.) Backeb.