Thallus: not developed.
Anamorph: not known.
Teleomorph: ascomata apothecia, mazaedial. Stalk 500-800 µm tall and 60-100 µm diam., dull grey to pale brown when mature, composed of infrequently branched parallel hyphae with a distinct brown core. Young ascomata faintly yellow-pruinose, the pruina often degenerating by maturity when the ascomata appear pinkish to reddish-brown with a pale pinkish to yellowish-brown mazaedium, often cracking irregularly when dry. Hymenium 200-300 µm diam., hemispherical to lenticular, with the excipulum not forming a distinct collar surrounding the stalk at the base of the fertile head. Interascal tissue absent. Asci 20-25 x 2.5-3 µm, cylindrical to cylindric-clavate, short-stalked, thin-walled and evanescent, without apical structures, 8-spored. Ascospores arranged uniseriately or partially biseriately, 3-3.5 (-4.5) µm diam., ± globose but rather variable in shape, hyaline (pale brown en masse), almost smooth-walled (light microscopy), with an irregular cracked ornamentation (SEM; Amo & Burgaz 2004).
Chemistry: no lichen substances detected.
BLS map: here
Assessed as Near Threatened by Woods & Coppins (2012), and considered to be Nationally Scarce.
The ascospores of this species are small and smooth (or almost smooth), those of other GB&I species are larger and warted.
In GB&I, known from Scotland (C & E Highlands), with single records from Cumbria, N Yorkshire, N Wales and Somerset.
In hollows, dry bark crevices and on wood of deciduous trees. Possibly also lichenicolous (see below).