Fungalpedia – Note 2427, Acrogenospora
Acrogenospora. M.B. Ellis.
Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank
Classification: Acrogenosporaceae, Minutisphaerales, Incertae sedis, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on decaying wood, bark, culms of bamboo in freshwater or terrestrial habitats. Sexual morph: Hysterothecia laterally compressed, with a prominent sunken slit, solitary to gregarious, erect and elevated, presenting an almost stipitate appearance, thick-walled. Pseudoparaphyses branched. Asci 8-spored, cylindrical, fusoid or obovate, obtuse at the apex, short pedicellate, thin-walled. Ascospores oval, aseptate, hyaline or moderately pigmented (Mason 1941; Jayasiri et al. 2018). Asexual morph: Hyphomycetous. Colonies effuse, dark brown to black, glistening, hairy. Mycelium mostly immersed, consist of septate, thin-walled, smooth, hyaline to pale brown hyphae. Conidiophores macronematous, mononematous, solitary, erect, subulate or cylindrical, straight or slightly flexuous, pale brown to dark brown, septate, unbranched, smooth. Conidiogenous cells holoblastic, monoblastic, integrated, terminal or intercalary, with percurrent proliferations, cylindrical. Conidia solitary, dry, acrogenous, simple, spherical, subspherical, olive to brown, aseptate, truncate at the base, smooth or verrucose (Ellis 1971; Hyde et al. 2019).
Notes: Acrogenospora is a holomorphic genus, characterized by laterally compressed hysterothecia with a prominent sunken slit, oval, aseptate, hyaline ascospores and spherical, olive to brown conidia (Hyde et al. 2019). Acrogenospora is used to suppress Farlowiella Sacc. (Rossman et al. 2015) and their sexual-asexual connections were linked based on molecular data (Jayasiri et al. 2018). Thus, Acrogenospora is the only genus in Acrogenosporaceae (Jayasiri et al. 2018; Hyde et al. 2019). The sequence data of the type species A. sphaerocephala were generated based on a freshwater collection from Thailand (Hyde et al. 2019). Bao et al. (2020) introduced seven new species collected from a small area of Yunnan Province, China, which indicated Acrogenospora is a speciose genus. 20 species were reported in Acrogenospora and 13 have been confirmed with molecular data (Bao et al. 2020). Freshwater Acrogenospora species are morphologically very similar and the sequence data are main evidence to separate them.
Type species: Acrogenospora sphaerocephala (Berk. & Broome) M.B. Ellis.
Other accepted species: Species Fungorum – search Acrogenospora.
References
Ellis MB (1971) Dematiaceous hyphomycetes. Commonwealth Mycological Institute, Surrey, England
Entry by
Wei Dong, Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China
Published online 22 May 2026