Unguiculariopsis lettaui  

Anamorph: not known.
Teleomorph: ascomata apothecia, 300-550 µm diam., erumpent from blackened patches on the thallus of the host lichen, ± sessile when mature, lacking a distinct stalk, in clusters of up to 10, dark reddish brown to almost black, appearing strongly pale grey-pruinose, cupulate, the excipulum swollen and incurved, often almost entirely obscuring the disc, weakly corrugated when dry. Excipulum 40-50 µm thick, thinner near the edge, composed of thick-walled, reddish brown angular cells mostly occluded with melanized material, the outer surface covered with hyaline, refractive flexuous recurved setae, 15-30 x 3-3.5 µm in size, swollen in the lower third but tapering to ca 1.5 µm diam.at the tip. Epithecium not differentiated, the excipulum covering the hymenium until mature. Hymenium 30-40 µm thick, hyaline, not reacting with iodine. Hypothecium to 35 µm thick, composed of hyaline to pale brown intertwined hyphae, merging into the excipulum. Interascal tissue composed of branched or unbranched hyaline paraphyses 2-3 µm diam., not markedly thickened nor pigmented at the tips. Asci 32-42 x 7-8 µm, cylindric-clavate, rather thick-walled, not fissitunicate, without any obvious thickening at the apex, weakly dextrinoid, apical structures absent, 8-spored, immersed in a mucous matrix. Ascospores uniseriately to partially biseriately arranged, (5.5-) 6-7 x 3-3.5 (-4) µm, ellipsoidal to slightly ovoid, rounded at the apices, aseptate, hyaline, fairly thin-walled, smooth, often with numerous guttules, without an epispore, gelatinous sheath or appendages.