This name is a synonym of Radula madagascariensis Gottsche.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35215829) with original publication details: Abh. Naturwiss. Vereine Bremen 7: 349 1882.
This name was in version 1 of The Plant List, record tro-35215829, and has not been changed.