This name is a synonym of Parodia microsperma subsp. horrida (F.W. Brandt) R. Kiesling & O. Ferrari.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50323488) with original publication details: Succulenta (Netherlands) 1964: 57 1964.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:183463-2.
This name was in version 1 of The Plant List, record tro-50323488.