Paranectriellaceae Boonmee & K.D. Hyde, in Hyde et al., Fungal Diversity 63: 186 (2013).

MycoBank number: MB 804521; Index Fungorum number: IF 804521, Facesoffungi number: FoF 07886, 24 species.

Parasitic (or biotrophic, hyperparasitic) on leaves causing slight discoloration around fruiting bodies. Sexual morph: Ascostromata superficial, crustose, solitary, scattered, white to light orange, fleshy, soft in texture, surrounded by colourless, sparse hairs, multi-loculate, with ascomata arranged in a peripheral outer layer. Locules globose to subglobose, with individual ostioles. Peridium relatively thin, composed of light yellow, thick-walled cells of textura angularis. Hamathecium comprising filiform, septate, branched, pseudoparaphyses, extending over asci and embedded in a gelatinous layer. Asci 8-spored, bitunicate, fissitunicate, cylindrical, oblong-clavate, apedicellate, rounded at the apex. Ascospores 2-seriate, broadly fusiform, hyaline, narrowed at the ends, multi-septate, slightly constricted at the septa, with apical spine-like appendages. Asexual morph: Hyphomycetous, staurosporous.

Type: Paranectriella (Henn. ex Sacc. & D. Sacc.) Magnus.

Notes: Paranectriellaceae was introduced to accommodate two hyperparasitic genera Paranectriella and Puttemansia (Hyde et al. 2013; Boonmee et al. 2014b). Rossman et al. (2015) proposed to protect Paranectriella over Araneomyces because Paranectriella was more widely reported and most species were not linked with Araneomyces. Currently, Par- anectriellaceae is placed in Dothideomycetes families incer- tae sedis (Wijayawardene et al. 2017a, 2020). Sequence data are needed to confirm the placement of taxa in this family.