This name is a synonym of Nothogymnomitrion erosum (Carrington & Pearson) R.M. Schust..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35206993) with original publication details: Pap. & Proc. Roy. Soc. Tasmania 1887: 8 1888.
This name was in version 1 of The Plant List, record tro-35206993.