Pleosporales » Phaeosphaeriaceae


Phaeopoacea Thambug., Dissan. & K.D. Hyde, in Thambugala et al., Mycosphere 8(4): 752 (2017).

Index Fungorum number: IF 552978; Facesoffungi number: FoF 03200, 9 morphological species (Species Fungorum, 2022), 5 species with molecular data.

Saprobic on grasses. Sexual morph: Ascomata scattered, immersed, subepidermal, globose, glabrous, ostiolate. Ostiole central, terete, papillate, short, undifferentiated. Peridium composed of 4 layers of brown cells of textura angularis. Hamathecium comprising numerous, thread-like, septate pseudoparaphyses. Asci bitunicate, 8-spored, broadly cylindrical, short pedicellate. Ascospores overlapping 1–2-seriate, narrowly fusiform, straight or slightly curved, 5-septate, first septum slightly constricted, not constricted at other septa, with a vertical septum in the mid cells, third cell from apex enlarged towards base, yellowish-brown, smooth-walled, with a uniform thin sheath. Asexual morph: Conidiomata pycnidial, solitary, or scattered, sometimes in linear rows, immersed, becoming slightly erumpent, dark brown to black, globose to subglobose, ostiolate. Conidiomatal wall comprising few layers of light to dark brown cells of textura angularis, hyaline at conidiogenous region. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, smooth, holoblastic forming conidia at terminal ends. Conidia pale brown to dark brown, oblong to subcylindrical, with rounded ends, 1–4-septate, guttulate, smoothwalled, with or without mucoid caps at the ends (Adapted from Thambugala et al., 2017).


Type species: Phaeopoacea festucae Dissanayake & K.D. Hyde


Notes: Phaeopoacea was introduced by Thambugala et al. (2017) with P. festucae as type species. Phaeopoacea is characterized by scattered, immersed, subepidermal, globose, glabrous, ostiolate ascomata, broadly cylindrical, short pedicellate asci and 1–2-seriate, narrowly fusiform ascospores. Phaeopoacea is morphologically and phylogenetically a well-defined and distinct genus in Phaeosphaeriaceae. Molecular markers available for Phaeopoacea include LSU, SSU, ITS, RPB2 and TEF1.


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