Aquastroma
Aquastroma Kaz. Tanaka & K. Hiray
Index Fungorum number: IF 811325; Facesoffungi number: FoF 08321
Saprobic on submerged twigs of woody plant. Sexual morph: Ascomata scattered to gregarious, immersed to erumpent, depressed globose. Ostiolar neck central, compressed, with a wide ostiole. Peridium composed of pale brown, thin-walled cells. Pseudoparaphyses septate, branched and anastomosed. Asci 8-spored, bitunicate, fissitunicate, clavate, pedicellate. Ascospores clavate to fusiform, slightly curved, multiseptate, slightly constricted at septa, hyaline, smooth, with an entire sheath. Asexual morph: Undetermined. (Descriptions from Dong et al. 2020)
Type species: Aquastroma magniostiolatum Kaz. Tanaka & K. Hiray.
Notes: The monotypic genus Aquastroma was introduced for a freshwater species A. magniostiolatum collected from Japan (Tanaka et al. 2015). Aquastroma fits well with the familial concept of Parabambusicolaceae and differs from other genera by its ascomata with a compressed neck and wide ostiole, and clavate to fusiform, multiseptate ascospores with an entire sheath (Tanaka et al. 2015). Aquastroma clustered within Parabambusicolaceae with high bootstrap support (Tanaka et al. 2015; Phookamsak et al. 2019). We recollected the type species A. magniostiolatum from submerged wood in Thailand. (Notes from Dong et al. 2020)
List of freshwater Biappendiculispora species
Aquastroma magniostiolata Kaz. Tanaka & K. Hiray., Stud. Mycol. 82: 115 (2015)
Freshwater distribution: Japan (Tanaka et al. 2015), Thailand (Dong et al. 2020)
References
Tanaka K, Hirayama K, Yonezawa H, Sato G, Toriyabe A, Kudo H, Hashimoto A, Matsumura M, Harada Y, Kurihara Y (2015) Revision of the Massarineae (Pleosporales, Dothideomycetes). Studies in Mycology 82:75–136
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