This name is a synonym of Radula appressa Mitt..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35215822) with original publication details: Sp. Hepat. 4: 169 1910.
This name was in version 1 of The Plant List, record tro-35215822, and has not been changed.