Aphanostigme Syd., Annls mycol. 24(5/6): 368 (1926).
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: Unknown (adapted from Boonmee et al. 2017).
Type species: Aphanostigme solani Syd.
Notes: 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. Fresh collections with DNA sequence data are needed to confirm the systematic position of Aphanostigme.