Fungalpedia – Note 2774, Guilliermondia
Guilliermondia. Boud.
Citation when using this data: Huang SK et al. 2021 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Sordariaceae, Sordariales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Coprophilous on horse dung. Sexual morph: Ascomata cleistothecial, solitary or gregarious, superficial, dark brown to black, tuberculate. Peridium outer layer composed of carbonaceous, dark tissues; inner layer composed of membranaceous, hyaline to dark brown cells of textura angularis. Paraphyses numerous, evanescent, filamentous, septate, branched. Asci 8-spored, unitunicate, spherical, without an apical ring, with long and evanescent pedicel. Ascospores overlapping, ellipsoidal, brown, aseptate, smooth-walled, surrounded by hyaline or brown gelatinous sheath. Asexual morph: Undetermined (adapted from Boudier 1904).
Notes: The monotypic Guilliermondia is typified by G. saccoboloides has black ascomata and ellipsoidal ascospores surrounded by a brown sheath (Boudier 1904). Initially, Boudier (1904) proposed that this genus is related to Phillipsiella (Saccardiaceae), and Guilliermondia was later considered similar to Sordaria and transferred to Sordariaceae (Kirk et al. 2008; Lumbsch and Huhndorf 2010; Hyde et al. 2020). In this study, Guilliermondia is placed in Sordariaceae, because the generic type G. saccoboloides is similar to Sordaria fimicola. Both taxa are isolated from the faeces of herbivores and have dark ascomata and ellipsoidal, brown ascospores with gelatinous sheaths.
Type species: Guilliermondia saccoboloides Boud., Bull. Soc. mycol. Fr. 20: 20 (1904).
Other accepted species: Species Fungorum – search Guilliermondia.
Figure 1 – Guilliermondia saccoboloides: a, b, e–l (PC-MNHN-PC-PC0167691, holotype); c, d (redrawn from Boudier 1904). a Label and herbarium material. b Ascomata. c Vertical view of ascoma. d Ascus and paraphyses. e–h Asci (pedicel evanescent). i–l Ascospores. Scale bars: b = 500 µm, c = 200 µm, d. h = 20 µm, e–l = 10 µm.
References
Boudier E 1904 – Sur un nouveau genre et une nouvelle espèce de Myriangiacées, le Guilliermondia saccoboloides. Bulletin De La Société Mycologique De France 20:19–22.
Entry by
Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China
Published online 18 June 2026