Cleistosphaeraceae Boonmee & K.D. Hyde, in Boonmee et al., Mycosphere 8(10): 1708 (2017).

MycoBank number: MB 553828; Index Fungorum number: IF 553828; Facesoffungi number: FoF 03669, 1 species.

Parasitic or saprobic on leaves. Mycelium superficial, branched, septate, with hyphopodia. Hyphopodia formed on mycelium, subglobose, dark brown Sexual morph: Ascomata superficial, grouped to solitary, globose to subglobose, dark brown, covered with mycelium. Hamathecium comprising sparse, septate, cellular pseudoparaphyses. Peridium comprises dark brown cells of textura angularis. Asci 8-spored, bitunicate, ovoid to broadly clavate, sessile or with knob-like pedicel. Ascospores 2–3-seriate, ellipsoid-oblong, hyaline to pale grey, aseptate, smooth-walled, with granular contents, gelatinous sheath. Asexual morph: Coelomycetous (adapted from Boonmee et al. 2017).

Type: Cleistosphaera Syd. & P. Syd.

Notes: Cleistosphaeraceae was established to accommodate the monotypic genus Cleistosphaera. The morphology of this family is quite similar to Botryosphaeriaceae, however, the generic type of Cleistosphaeraceae, Cleistosphaera differs from Botryosphaeriaceae by its ascomata features, mycelium with hyphopodia and sparse pseudoparaphyses.