Seriascoma Phook., D.Q. Dai & K.D. Hyde, Fungal Diversity 82: 30 (2016)
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, hyphalike, 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 Conidiogenous cells reduced. phialidic, determinate, discrete, cylindrical to ampulliform or lageniform, hyaline. Conidia oblong, hyaline, aseptate (Dai et al. 2017).
Type species: Seriascoma didymosporum Phook., D.Q. Dai, Karun. & K.D. Hyde
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).
List of freshwater Seriascoma species
Seriascoma didymosporum Phook., D.Q. Dai, Karun. & K.D. Hyde [as ‘didymospora’], Fungal Diversity 82: 32 (2016)
Freshwater distribution: China (Dong et al. 2020)
Tibpromma S, Hyde KD, McKenzie EHC, Bhat DJ, Phillips AJL, Wanasinghe DN, Samarakoon MC, Jayawardena RS, Dissanayake AJ, Tennakoon DS, Doilom M, Phookamsak R, Tang AMC, Xu J, Mortimer PE, Promputtha I, Maharachchikumbura SSN, Khan S, Karunarathna SC (2018) Fungal diversity notes 840–928: micro-fungi associated with Pandanaceae. Fungal Divers 93:1–160. https://doi.org/10.1007/s13225-018-0408-6