This name is a synonym of Dicranum elongatum Schleich. ex Schwägr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35124234) with original publication details: Laubm. Deutschl. 1: 360 1886.
This name was in version 1 of The Plant List, record tro-35124234.