Corticolous, mainly on Quercus, rarely over lichens (e. g. species of Parmelia s.l.), mainly in forests.

Belgium: Fl.: RRR, Mosan: RR, Ard.: R, Lorr.: RR.

Luxembourg: Ard.: AR, Lorr.: R.

France: - .

Lit.: Di: 204, L2: 97, NL84: 17, Giralt et al. (1997: 122-124).