Mém. Soc. Imp. Sci. Nat. Cherbourg 3: 166 (1855).

Basionym: Collema demangeonii Moug. & Mont., Annls Sci. Nat., Bot., Sér. 3 12: 291 (1849).

Note: "This rare lichen is not uncommon at Jonas Rockslide, growing scattered amongst other lichens; however the tiny, umbilicate squamules are only visible under a dissecting microscope. It is often growing amongst areoles of Rhizocarpon bolanderi, a co-occurrence also noted by Gelting in Greenland (Gelting 1954)" (John 1989: 109).