This name is a synonym of Adiantum myriosorum Baker.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26617685) with original publication details: Bull. Herb. Boissier, sér. 2, 3: 511 1903.
This name was in version 1 of The Plant List, record tro-26617685.