This name is a synonym of Pediocactus paradinei B.W. Benson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50222555) with original publication details: Acta Mus. Richnov. Sect. Nat. 5(1): 13 1998.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1006296-1.
This name was in version 1 of The Plant List, record tro-50222555, and has not been changed.