This name is a synonym of Adiantum tetraphyllum Humb. & Bonpl. ex Willd..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26616852) with original publication details: Prim. Fl. Costaric. 3(1): 19 1901.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:5086-2.
This name was in version 1 of The Plant List, record tro-26616852.