Fungalpedia – Note 2786, Periamphispora
Periamphispora. J.C. Krug.
Citation when using this data: Huang SK et al. 2021 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Incertae sedis, Sordariales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Coprophilous. Sexual morph: Ascomata perithecial, solitary to scattered, superficial to semi-immersed, globose to subglobose, brown, membranaceous to coriaceous, tuberculate, surrounded by hairs, ostiolate, with papilla. Peridium composed of pale brown to hyaline cells of textura porrecta to textura angularis to textura prismatica. Paraphyses numerous, filiform, septate, evanescent. Asci 8-spored, unitunicate, cylindrical to clavate, pedicellate, apex rounded. Ascospores bi-seriate, ellipsoidal to oval, aseptate, ends rounded, with a germ pore at the apex, hyaline when young, becoming brown to reddish brown, rough-walled, surrounded by hyaline, gelatinous sheath. Asexual morph: Undetermined (adapted from Krug 1989).
Notes: The monotypic genus Periamphispora is characterized by globose to subglobose ascomata with hairs and ellipsoidal ascospores irregularly ribbed on the surface, which is similar to Fimetariella, Podospora and Sordaria (Krug 1989). This genus was previously considered a member in Lasiosphaeriaceae (Krug 1989; Maharachchikumbura et al. 2015, 2016; Wijayawardene et al. 2020). This genus is also similar to Podospora and Sordaria in having hairy ascomata, clavate to cylindrical asci and ellipsoidal ascospores with sheath, however molecular data are unavailable.
Type species: Periamphispora phacelodes J.C. Krug, Mycologia 81(3): 476 (1989).
Other accepted species: Species Fungorum – search Periamphispora.
Figure 1 – Periamphispora phacelodes: (TRTC-55023, holotype). a Herbarium material label. b Ascomata on Weitzman and Silva-Hutner’s agar medium. c Appearance of ascoma with hyphae. d Ascoma in cross section. e Peridium. f Perithecial neck with periphyses. g Hyphae. h Asci. i–k Ascospores with germ pore (arrowed and enlarged the apical germ pore). Scale bars: b = 1 mm, c = 500 µm, d = 200 µm, e–g = 50 µm, h = 100 µm, i–k = 20 µm.
References
Krug JC 1989 – Periamphispora, a new genus of the Sordariaceae. Mycologia 81:475–479.
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