Pleosporales » Phaeosphaeriaceae


Poaceicola W.J. Li, Camporesi, Bhat & K.D. Hyde, in Li et al., Mycosphere 6(6): 696 (2015).

Index Fungorum number: IF 551658; Facesoffungi number: FoF 01298, 10 morphological species (Species Fungorum, 2022), 10 species with molecular data.

Saprobic on dead stems of plant host. Sexual morph: Ascomata solitary to gregarious, black, immersed to semi-immersed, subepidermal, uniloculate, glabrous, globose to subglobose, papillate. Ostiole centrally located, black, smooth, with an ostiole, filled with hyaline periphyses. Peridium thick-walled, brown, composed of cells of textura angularis. Hamathecium comprising cellular, septate, broad, dense pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindrical, with a short, broad pedicel. Ascospores tetraseriate or partially overlapping, reddish-brown, fusiform, straight or inequilaterally curved, echinulate, 10-septate, fourth cell from apex swollen towards middle and slightly longer than adjacent cells, with a conspicuous sharply delimited sheath. Asexual morph: Coelomycetous. Conidiomata pycnidioid, solitary or aggregated, immersed or semi-immersed, unilocular, globose, papillate, dark brown. Wall of conidiomata comprising inner layers of textura angularis cells, gradually merging with the outer surrounding layers of brown, textura oblita. Ostiole central, circular to oval, papillate. Conidiophores reduced to conidiogenous cells. Conidiogenous cells holoblastic, phialidic, hyaline, smooth-walled, discrete, formed from the inner cells of the stroma. Conidia pale brown, cylindrical or sub-cylindrical, up to 7-euseptate, straight or slightly curved, smooth-walled (Adapted from Li et al., 2015).


Type species: Poaceicola arundinis W.J. Li, Camporesi, D.J. Bhat & K.D. Hyde


Notes: Poaceicola is characterised by solitary to gregarious, black, immersed to semi-immersed ascomata, fissitunicate, cylindrical asci and tetraseriate or partially overlapping, reddish-brown, fusiform, straight or inequilaterally curved, echinulate, 10-septate ascospores. Li et al. (2015) introduced the combination Poaceicola elongata (≡ Phaeosphaeria elongata) and two asexual morphs P. arundinis and P. bromi. Poaceicola is morphologically and phylogenetically a distinct and well-defined genus in Phaeosphaeriaceae. Molecular markers available for Poaceicola include ITS, LSU, SSU, and RPB2.


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