Fungalpedia – Note 2463, Seriascoma
Seriascoma Phook., D.Q. Dai & K.D. Hyde
Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Occultibambusaceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on decaying or submerged bamboo culms. Sexual morph: Ascostromata gregarious, immersed beneath clypeus, coriaceous, uni- to multi-loculate, ostiolate, with slit-like opening. Locules arranged in rows, immersed, subglobose to ampulliform, or quadrilateral, with ostiolate papilla. Peridium thick-walled, composed of several layers of small, dark brown, pseudoparenchymatous cells of textura angularis. Pseudoparaphyses numerous, cellular, hypha-like, broadly filamentous, hyaline, septate. Asci 8-spored, bitunicate, fissitunicate, clavate, long pedicellate, apically rounded, with a well-developed, ocular chamber. Ascospores uni- to tri-seriate, clavate to fusiform, hyaline, septate (Dai et al. 2017). Asexual morph: Coelomycetous. Conidiomata eustromatic, solitary to gregarious, immersed, conical, uniloculate, black. Peridium comprising host and fungal tissue, with several layers of dark brown to black, pseudoparenchymatous cells of textura angularis. Conidiophores reduced. Conidiogenous cells phialidic, determinate, discrete, cylindrical to ampulliform or lageniform, hyaline. Conidia oblong, hyaline, aseptate (Dai et al. 2017).
Notes: The monotypic genus Seriascoma, typified by S. didymosporum, was introduced by Dai et al. (2017). The asexual morph was produced on WA with oblong, hyaline, aseptate conidia, which are similar to Occultibambusa fusispora (Dai et al. 2017). However, the sexual morph of Seriascoma is characterized by elongate, multiloculate ascostromata with a slit-like opening, which are different to the uniloculate ascostromata with a central papilla of Occultibambusa. Seriascoma formed a distinct clade and nested in Occultibambusaceae with high bootstrap support (Dai et al. 2017; Tibpromma et al. 2018). We re-collected the type species S. didymosporum from submerged wood in China.
Type species: Seriascoma didymosporum Phook., D.Q. Dai, Karun. & K.D. Hyde.
Other accepted species: Species Fungorum – search Seriascoma.
Figure 1 – Seriascoma didymosporum (MFLU 18-1185, new habitat and geographical record). a Ascostromata immersed in host substrate. b Vertical section of ascoma. c Structure of peridium. d–g Bitunicate asci. h Pseudoparaphyses. i–l Ascospores. m Germinated ascospore. n, o Colony on PDA (up-front, down-reverse). Scale bars: b = 50 μm, c, m = 20 μm, d–h = 10 μm, i–l = 5 μm.
References
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 15 May 2026