This name is a synonym of Radula quadrata Gottsche.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35215830) with original publication details: Sp. Hepat. 4: 168 1910.
This name was in version 1 of The Plant List, record tro-35215830, and has not been changed.