Lichens of Belgium, Luxembourg and northern France
Syn.: Naetrocymbe saxicola auct. luxemb., non (A. Massal.) R. C. Harris
Non-lichenized, on calcareous or siliceous rocks and stones in streams, associated with algae and cyanobacteria, probably not lichenized.
Belgium: Mosan: RRR.
Luxembourg: Lorr.: RR.
France: Lorr.: RRR.
Lit.: Molitor & Diederich (1997: 74-76, sub Naetrocymbe saxicola), Roux (2009).