This name is a synonym of Fissidens dubius P. Beauv..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35180348) with original publication details: Ann. Sci. Nat., Bot., sér. 7, 17: 335 1893.
This name was in version 1 of The Plant List, record tro-35180348, and has not been changed.