This name is a synonym of Diphasiastrum madeirense (J.H. Wilce) Holub.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26609531) with original publication details: Nova Hedwigia 3(1): 111 1961.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17443420-1.
This name was in version 1 of The Plant List, record tro-26609531, and has not been changed.