Guilliermondia Boud., Bull. Soc. mycol. Fr. 20(1): 19 (1904)
MycoBank number: MB 2150; Index Fungorum number: IF 2150; Facesoffungi number: FoF 13565; 1 morphological species.
Type species – Guilliermondia saccoboloides Boud.
Notes – This monotypic genus Guilliermondia has sphaerical asci and ellipsoid ascospores surrounded by a brown sheath (Boudier 1904).

Figure 229 – Guilliermondia saccoboloides (Material examined – FRANCE, Lyon, 69 Rhôneon, on horse dung, April 1903, MAA Guilliermond, PC 0167691, holotype). a Label and material. b Ascomata. c-e Asci. f-i Ascospores. Scale bars: b = 500 µm, c-e = 5 µm, f-i = 2 µm.
Species
Guilliermondia saccoboloides