This name is a synonym of Zygosicyos pubescens (Keraudren) G.D. Rowley.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 9200370) with original publication details: Bull. Soc. Bot. France 111: 182, f. 1 1964.
This name was in version 1 of The Plant List, record tro-9200370, and has not been changed.