This name is a synonym of Rhipsalis pacheco-leonis subsp. catenulata (Kimnach) Barthlott & N.P. Taylor.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 5106758) with original publication details: Cact. Succ. J. (Los Angeles) 64: 91 1992.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:965792-1.
This name was in version 1 of The Plant List, record tro-5106758.