F.K.A.E.J. de Thümen [1-750, plus extras]

University of Illinois Fungarium - Fungi
Catalog #: ILL00085422
s.n.
Microstroma quercinum (Opiz) Niessl

USDA United States National Fungus Collections
Catalog #: BPI 1034058
Thumen #s.n. 00 September 1879
Microstroma quercinum (Opiz) Niessl
Austria, Near Kalksburg, Nieder-Oesterreich

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00059968
von Thumen s.n. 00 September 1879
Microstroma quercinum (Opiz) Niessl
Austria, Niederösterreich, Mödling, Nieder-Oesterreich: bei Kalksburg