Minutisphaera Shearer, A.N. Mill. & A. Ferrer, Mycologia 103(2): 415 (2011)
Index Fungorum number: IF 518355; Facesoffungi number: FoF 08067, 5 morphological species (Species Fungorum 2021), 5 species with molecular data.
Saprobic on submerged wood. Sexual morph: Ascomata small, globose to sub globose, or apothecioid, erumpent to superficial, brown, with an ostiole and irregularly curved, dark brown to black hyphae-like structures around the ostiole. Peridium thin-walled, composed of textura angularis to globosum. Pseudoparaphyses septate, with or without enlarged pigmented tips. Asci fissitunicate, eight-spored, ovoid to obclavate, lacking a stalk, rounded at apex. Ascospores 1–2-septate, clavate, multiguttulate, hyaline becoming pale brown, with fusiform gelatinous sheath, with or without numerous filamentous appendages radiating around the midseptum. Asexual morph: Unknown (Adapted from Raja et al. 2013).
Type species: Minutisphaera fimbriatispora Shearer, A.N. Mill. & A. Ferrer
Notes: Minutisphaera was introduced by Shearer et al. (2011) with M. fimbriatispora as type species. Minutisphaera is characterized by small, globose to subglobose, ostiolate ascomata, septate, cellular pseudoparaphyses, fissitunicate, ovoid to obclavate asci and hyaline to brown, 1-septate, ascospores with or without a gelatinous sheath. Minutisphaera was accommodated in Minutisphaeraceae and in the order Minutisphaerales by Raja et al. (2015). Zhang et al. (2012) suggested that Minutisphaera could be placed in Pleosporales but this was refuted by other authors (Liu et al. 2017, Hongsanan et al. 2020). Lately, Bao et al. (2019) introduced a new species of Minutisphaera.
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