Gloniella adianti  

Description contributed by Graham Kinsey (CABI).

Anamorph: unknown.

Teleomorph: ascostromata 0.5-0.75 x 0.3 mm. Peridium with side walls composed of fused interwoven brown-walled hyphae, basal region similar and with loosely interwoven brown marginal hyphae extending into the substrate, with a layer of hyaline cells forming the floor of the cavity. Interascal tissue of paraphysoids, equal to the asci and ca 2 µm wide, rarely branched. Asci 72-86 x 10-13 µm, cylindrical, tapered at the base, apex conical-truncate with a shallow internal ring. Ascospores (16-)20-24 x 4 µm, 3- to 5-septate, with a two-layered sheath, inner layer 1 µm thick, outer layer 3 µm thick.

GB & I material not seen.  Description of material from Madeira (IMI 30547) on Adiantum capillus-veneris provided for reference.