This name is a synonym of Riccardia nana (Hook. f. & Taylor) Trevis..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35200322) with original publication details: Syn. Hepat. 497 1846.
This name was in version 1 of The Plant List, record tro-35200322, and has not been changed.