This name is a synonym of Cymodocea serrulata (R.Br.) Asch. & Magnus.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 308877) with original publication details: Pflanzenr. IV, 11: 147 1907.
This name was in version 1 of The Plant List, record kew-308877, and has not been changed.