Pleosporales » Phaeosphaeriaceae

Aphanostigme

Aphanostigme Syd., Annls mycol. 24(5/6): 368 (1926)

 Index Fungorum number: IF 248; Faceoffungi number: FoF 08327, 21 morphological species (Species Fungorum 2020), molecular data unavailable

Parasitic on surface of living leaves. Sexual morph: Ascomata superficial, globose to subglobose, solitary, seated on dark brown hyphae, covered by dark brown setae, tapering towards subacute apex, septate, with apical ostiole. Peridium comprising 2–3 layers of dark brown cells of textura angularis. Hamathecium comprising numerous, branched, septate, hyaline, cylindrical to filiform pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, oblong to cylindrical to clavate, with minute ocular chamber, pedicellate. Ascospores 2-seriate, cylindric fusiform, 3-septate, constricted at septum, hyaline, surrounded by thin sheath, smooth-walled. Asexual morph: Undetermined.

 

Type species: Aphanostigme solani Syd.

 

Notes: Aphanostigme was introduced by Sydow (1926) with A. solani as type species. Aphanostigme resembles genera in Phaeosphaeriaceae in having superficial, solitary ascomata, placed on hyphae, with an apical ostiole, oblong to cylindrical, bitunicate asci and cylindrical fusiform, 3-septate, hyaline ascospores, with a thin gelatinous sheath.

 

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