Pleosporales » Pleosporales, genus incertae sedis


Glaxoa P.F. Cannon, Syst. Ascom. 15(1-2): 122 (1997).

Index Fungorum number: IF 9919; Facesoffungi number: FoF xx, 1 morphological species (Species Fungorum 2022), molecular data unavailable.

Saprobic on dead culm of Bambusa sp. in evergreen forest. Colonies effuse, brown to dark brown. Mycelium partly superficial, partly immersed in the substratum, composed of branched, septate, pale brown, smooth-walled hyphae, 2–4 μm wide. Sexual morph: Undetermined. Asexual morph: Conidiophores macronematous, mononematous, erect, straight or flexuous, unbranched, smooth, thick-walled. Conidiogenous cells monoblastic, terminal, lageniform, determinate or percurrent, pale brown to brown, smooth. Conidia solitary, dry, acrogenous, subglobose or turbinate, aseptate, hollow, pedicellate, with 4–7 filiform appendages in the anterior region which are continuous or sometimes 4–21-septate, smooth, pale brown to brown, conidia with long, appendages. Sexual morph: Unknown (Adapted from Ariyawansa et al. 2014).


Type species: Glaxoa pellucida P.F. Cannon


Notes: Glaxoa was introduced by Cannon (1997) with G. pellucida as type species. Glaxoa is characterized by effuse, brown to dark brown colonies, macronematous, mononematous conidiophores, solitary, dry, acrogenous, subglobose or turbinate, aseptate conidia with 4–7 filiform appendages. Cannon (1997) treated Glaxoa in Tubeufiaceae based on morphological similarities to Letendraea, a member of Pleosporales (Boonmee et al. 2011; Boonmee et al. 2014).  Boonmee et al. (2014) examined the type material of G. pellucida from IMI, but it was in poor condition. Glaxoa differs from other genera in Tubeufiaceae in having 1-septate ascospores.  Glaxoa is currently placed in Pleosporales incertae sedis. Molecular data is lacking for Glaxoa. Fresh collections and more taxa with DNA sequence data is needed to confirm the taxonomic placement of the genus.


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