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

University of Illinois Herbarium
Catalog #: ILL00085333
s.n.
Sphaerella pusilla Auersw.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00060513
Prof. Passerini s.n.
Mycosphaerella pusilla (Auersw.) Johanson
Italy