Annulatascaceae S.W. Wong, K.D. Hyde & E.B.G. Jones, Syst. Ascom. 16(1-2): 18 (1998)

MycoBank number: MB 81939; Index Fungorum number: IF 81939; Facesoffungi number: FoF 01212; 38 species.

Saprobic on submerged wood; sometimes on bamboo and on other substrates in terrestrial habitats. Sexual morph: Ascomata perithecial, scattered or densely aggregated in patches, immersed, partially superficial, brown to black, ostiolate, unilocular, rarely clypeate, globose to subglobose, ellipsoidal, smooth or rough-walled with short setose-like hyphae on the outside. Ostiolar necks cylindrical to conical, black, black at the base and pale yellow or lighter at the apex in some genera, glabrous, rarely with setae, hyphae or hairs. Peridium carbonaceous or coriaceous composed of cells of textura angularis, textura intricata, textura epidermoidea or textura prismatica with compressed cells. Paraphyses numerous, septate, branched or unbranched, tapering. Asci 8-spored, unitunicate, cylindrical, pedicellate, usually with a massive J-, refractive, cylindrical to flaring, doughnut-shaped, apical ring. Ascospores usually uniseriate, sometimes overlapping, hyaline to pale yellow or brown, ellipsoidal to oval or fusiform or lunate or citriform, unicellular or septate, septa mostly transverse, smooth or roughed, with or without appendages, mucilaginous sheath and germ pores. Asexual morph: Hyphomycetous. taeniolella-like for Chaetorostrum where Conidiophores are micronematous, mononematous. Conidia monoblastic, elongate cylindrical, trans-septate, euseptate, brown, paler near the apex. Conidial secession schizolytic (adapted from Maharachchimbura et al. 2016b).

Type genusAnnulatascus K.D. Hyde

Notes – Annulatascaceae was introduced by Wong et al. (1998d), with Annulatascus as the type genus. Maharachchikumbura et al. (2015) formally placed it in Annulatascales based on phylogenetic analyses. Many genera, having a relatively massive apical ring, were placed in Annulatascaceae as listed in Maharachchikumbura et al. (2016b). Zhang et al. (2017a) excluded some genera to other families and Diaporthomycetidae genera incertae sedis based on phylogenetic analyses and divergence estimates. Currently, ten genera are accepted in this study (as listed below). Annulatascaceae species clustered in a distinct clade, but with low bootstrap support as shown in Luo et al. (2019) and this study.