Several names share this combination and are defined under the rules of the botanical code. The species name Rivularia multifida might be an homonymy case.
The name Rivularia multifida is a slight homonymy case. This name is used according to the rules of several different nomenclatural codes.

Rivularia multifida Roth.

Botany

Rivularia multifida F.Weber & D.Mohr

Botany

Rivularia multifida F.Weber & D.Mohr

Zoology