This name is a synonym of Riccardia multifida var. decrescens (Stephani) Furuki.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35192077) with original publication details: Sp. Hepat. 1: 227 1899.
This name was in version 1 of The Plant List, record tro-35192077.