Coccoideaceae P. Henn. ex Sacc. & D. Sacc., Henn. ex Sacc. & D. Sacc., Syll. fung. (Abellini) 17: 860 (1905).

MycoBank number: MB 80616; Index Fungorum number: IF 80616, Facesoffungi number: FoF 07953, 14 species.

Parasitic on living leaves. Sexual morph: Ascostromata large, up to 2 mm diam., single to solitary, or scattered, mostly superficial, slightly immersed in host tissue, circular to subcircular, discoid, cushion-like, semicircular in section, edge entire, slightly convex at the top, raised from the base, black, thickened at the base, soft, multi-loculate, in a layer in the upper part the ascostromata. Cells of ascostromata comprising heavily, pigmented cells of textura angularis. Locules completely immersed in ascostromata, globose, subglobose or obpyriform, with apical ostiole. Hamathecium comprising filiform, anastomosing, branched, septate, hyaline, relatively wide, cellular pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindrical to subclavate, pedicellate, apically rounded, with a distinct, wide, ocular chamber. Ascospores 2-seriate, apiosporous, ellipsoidal-obovoid, slightly oval, subglobose, tapering towards the narrow, lower end, yellowish to light brown, 1-septate at the lower end, not constricted at the septum, darkened at the septa, smooth-walled. Asexual morph: Undetermined.

Type: Coccoidea Henn.

Notes: Coccoideaceae includes Coccoidea, Coccoidella and Englerodothis, and is treated in Dothideomycetes as family incertae sedis (Hyde et al. 2013; Boonmee et al. 2017; Wijayawardene et al. 2018; Pem et al. 2019c). The characteristic feature of the family is ascostromata which are formed as circular to discoid or cushion-like with dark pigment, which is rather unique of its members. Boonmee et al. (2017) revisited Coccoidella and provided a description and illustration of type species C. scutula and accepted this genus in Coccoideaceae. Pem et al. (2019c) included Englerodothis in Coccoideaceae. The family lacks molecular data to establish phylogenetic placement, especially as the type species is yet to be sequenced and no additional new taxa in this family.