Corticolous, mainly on the dry and rough bark of old Quercus trees in well-preserved forests, rarely at the base of Picea in humid habitats.

Belgium: Camp.: RRR, Brab.: RR, Mosan: AR, Ard.: R (locally common in the Anlier forest), Lorr.: RRR.

Luxembourg: Ard.: RRR, Lorr.: AR.

France: Boul.: RR, Pic.: RR.

Lit.: Boul.: 69, Di: 114, NL84: 14, NL97: 49.