Phaeoappendicospora Senan., Q.R. Li & K.D. Hyde, Stud. Mycol. 86: 217–296 (2017)

Index Fungorum number: IF821572; 1 species with sequence data

Etymology: Name based on three Latin words “phaeo”, “appendicem” and “spora” referring to the brown spores with appendages.

Saprobic on dead stems of Fagaceae species. Sexual morph Stromata forming thin weft of pale brown hyphae around upper part of perithecia. Ascomata immersed, aggregated, subglobose to globose, coriaceous, black, ostiolate, papillate. Papilla black, cylindrical, lateral, periphysate. Periphyses hyaline, filamentous. Peridium comprising few layers of black, thick-walled, cells of textura angularis. Hamathecium comprising few, septate, hyaline paraphyses attached to the base, longer than asci. Asci 8-spored, unitunicate, ellipsoid, with a short pedicel, inconspicuous, flat, J- refractive ring at the lower end of the thickened apical wall, apex narrow and blunted. Ascospores ellipsoidal to ovoid, with broadly rounded ends, pale brown, 1-septate, not constricted at the septa, thick and smooth-walled, guttulate, with short, hyaline, rounded appendages at both ends. Asexual morph Undetermined.

Type species: Phaeoappendicospora thailandensis Q.R. Li, Senan. & K.D. Hyde.

Notes – Phaeoappendicospora was introduced in Diaporthales genera incertae sedis. The genus has been introduced based on Phaeoappendicospora thailandensis, obtained from a dead branch of Quercus sp. The species resembles Hapalocystis berkeleyi (Sydowiellaceae). It did not, however, cluster with any Hapalocystis taxa nor with any family in the Diaporthales, which resulted in its being classified as genera incertae sedis (Senanayake et al. 2017b). Crous et al. (2019b) introduced Phaeoappendicosporaceae for this genus with Neophaeoappendicospora. The genus is characterised by brown and small ascospores. Phaeoappendicospora thailandensis is illustrated in this entry.