This name is a synonym of Riccia trichocarpa M. Howe.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35191497) with original publication details: Bull. Herb. Boissier 6: 320 1898.
This name was in version 1 of The Plant List, record tro-35191497, and has not been changed.