Corticolous, mostly on old Fagus, Fraxinus and Quercus trees, in well-preserved forests.

Belgium: Brab.: RR (†<1900), Mosan: RR (†<1900), Ard.: AR→RR (now only present in the southern part), Lorr.: R→RR.

Luxembourg: Ard.: RR (†1979), Lorr.: RR (2008).

France: Boul.: RR (1999), Pic.: R (?†1973), Lorr.: RRR (2004).

Lit.: Boul.: 62, L4: 19, L11, La66: 219-223, WS: 36, 73, Diederich et al. (2006).