Nemania gwyneddii  

Anamorph: Geniculosporium-like. Conidiophores forming in small clumps after 2 wk in culture, more profusely close to teleomorph structures, 2-4 µm diam, decumbent to erect, dichotomously or sympodially branched, not synnematous, often without a well-defined main axis, pale brown. Fertile regions mainly terminal but also intercalary and then separated by smooth sterile areas, proliferating sympodially, geniculate with conspicuous conidial scars. Conidia produced in acropetal succession, 2.5-8.5 x 2-3 µm, ovoid to ellipsoidal, truncate at the base, hyaline to subhyaline, aseptate, smooth, without a gelatinous sheath or appendages.
Teleomorph: stromata forming on decorticated wood, also produced in culture; on wood 11-25 x 3-5 mm, elongate-elliptical in outline, 0.6-2 mm thick, almost applanate, dark purple-brown, becoming black when over-mature. Ascomata scattered, 500-700 µm diam, hardly raising the stroma surface, with conspicuous minutely papillate ostioles. Interascal tissue not seen, presumably due to degeneration of the available specimens. Asci 140-190 x 9-12 µm, cylindrical, long-stalked, the stalk 28-45 µm in length, with an urniform or inverted hat-shaped apical ring structure 5-7 µm high and 3-4 µm diam that stains blue with iodine, 8-spored. Ascospores uniseriately or obliquely uniseriately arranged, 19.5-25.9(-27.5) [mean=22.8, sd=2.03, n=30] x (5.1-)6-9 µm [mean=6.7, sd=0.92, n=30] µm, ellipsoidal to fabiform (inaequilateral) with broadly rounded ends, distinctly wider when mature, with a short fairly conspicuous germ slit 3-4 µm long on the more convex side, pale brown, smooth-walled, aseptate, perispore apparently absent, without a gelatinous sheath or appendages.