in Aptroot, Diederich, Herk, Spier & Wirth, Lichenologist 29, 5: 416 (1997). Type locality: Netherlands, On bark of Quercus robur, van Herk 2493-5 (B - holotype).
Type locality: Netherlands, On bark of Quercus robur, van Herk 2493-5 (B - holotype).