Fungalpedia – Note 2442, Pseudoasteromassaria
Pseudoasteromassaria. M. Matsum. & Kaz. Tanaka.
Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Latoruaceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on submerged wood or parasitic on twigs. Sexual morph: Ascomata scattered, immersed, subglobose, brown to black, ostiolate. Peridium two-layered. Pseudoparaphyses numerous, cellular, hyaline, septate, branched. Asci 8-spored, bitunicate, cylindrical to clavate, pedicellate. Ascospores bi- to tri-seriate, fusiform, brown, septate (Ariyawansa et al. 2015). Asexual morph: Coelomycetous. Conidiomata pycnidial, solitary or scattered, immersed or superficial, globose, ellipsoidal, conical, dark brown to black, ostiolate. Peridium two-layered. Conidiophores absent. Conidiogenous cells enteroblastic, phialidic, cylindrical or pyramidal, doliiform to ampulliform. Conidia variable in shape, truncate at the base, aseptate or septate, hyaline (Ariyawansa et al. 2015; Tibpromma et al. 2017).
Notes: The type species Pseudoasteromassaria fagi was found on twigs with both sexual and asexual morphs, and it produces cylindrical, hyaline, septate conidia in culture (Ariyawansa et al. 2015). The second species P. spadicea W. Dong et al. was described from submerged wood in freshwater habitats. Pseudoasteromassaria spadicea differs from the asexual morph of P. fagi by its subglobose, aseptate conidia (Tibpromma et al. 2017).
Type species: Pseudoasteromassaria fagi M. Matsum. & Kaz. Tanaka
Other accepted species: Species Fungorum – search Pseudoasteromassaria.
Figure 1 – Pseudoasteromassaria aquatica (MFLU 18-1519, holotype). a Conidiomata immersed in host. b Vertical section of pycnidium. c Structure of peridium. d, e Conidiogenous cells with conidia. f–j Conidia. k Germinated conidium. l, m Colony on PDA (up-front, down-reverse). Scale bars: b = 50 μm, c–e, j = 10 μm, f, k = 20 μm, g–i = 5 μm
References
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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
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