Anamorph: not known. Teleomorph: causing subspherical to applanate galls 400-700 µm diam, on the host lichen, at first concolorous with the thallus, later brownish, normally dispersed but sometimes grouped and even coalescing. Ascomata perithecia, 40-50 µm diam., immersed, numerous within galls, never erumpent. Peridium ca 10 μm thick, composed of several layers of polyhedric cells, hyaline even in the apical area, although sometimes brownish grey in mature ascomata. Hymenium hyaline, I–, with abundant oil droplets 0.5–2 μm diam. Interascal tissue of paraphyses that dissolve as the ascomata mature. Periphyses surrounding the ostiolar channel, 2–3 μm diam., abundant, hyaline, septate, with small droplets inside, slightly thickened at the apex. Asci 59–76 × 10.5–12.5 μm, cylindric-clavate, the apices obtuse, thin-walled with no clear apical structures, 8-spored. Ascospores arranged biseriately, 10.5–13 × (6–) 7–8 μm, widely ellipsoidal to obovoid, 1-septate, constricted at the submedian septum, with obtuse ends or slightly pointed apex in the lower cell which is less than half the size of the upper, hyaline, sometimes becoming very pale yellow with age, with small oil droplets, thin-walled, smooth, without an epispore or gelatinous sheath.