This name is a synonym of Dioscorea amazonum Mart. ex Griseb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 240985) with original publication details: Pflanzenr. IV, 43: 147 1924.
This name was in version 1 of The Plant List, record kew-240985.