The
thallus of this
crustose lichen has a distinctive
areolate structure, with the individual
areoles varying considerably in their appearance. They typically range from 0.2–0.6(−1.2) mm in diameter, displaying an angular, irregular shape. The areoles can exhibit a pale to dark grey coloration, sometimes taking on a brownish tint that gives the thallus a discolored look. Separating the areoles is a narrow, black
prothallus that helps delineate the edges of the thallus. Reproductive structures on this lichen are represented by its lecideine
apothecia, which remain immersed within the thallus rather than developing a raised,
sessile appearance. These apothecia are relatively small, measuring (0.1–)0.2–0.2(−0.5) mm in diameter. The apothecial margin is black, but indistinct and reduced, while the disc itself is flat and black, lacking any sort of
pruina or surface bloom. The excipular anatomy of the apothecia is rather narrow and poorly differentiated. The inner
hyphae are
hyaline and
prosoplectenchymatous, often resembling the orientation and appearance of the
paraphyses. In contrast, the outer excipular hyphae are parallel, moderately swollen, and heavily pigmented in various shades of brown and greenish blue. This pigmentation of the outer exciple also extends into the brown
epihymenium. The
hymenium itself is hyaline and lacks any conspicuous oil droplets. The paraphyses exhibit a simple to moderately branched morphology, with their apical portions swollen and capped in a brown pigment. Turning to the
asci, they are clavate in shape and contain 8 ascospores each. Those ascospores start out as a blue-green color but eventually mature into a dark brown hue. They are 1-septate, broadly ellipsoid in shape, and become constricted with age, measuring (11–)11.6–[12.8]–14.1(−17) x (5–)7.2–[8.1]–8.9(−10) μm.
Pycnidia are quite rare on this lichen. When present, they take on a
urceolate to
globose,
unilocular structure, with conidiogenous cells that are primarily terminal (apical), though occasionally also
intercalary (among or between sub-apical cells). The
conidia produced within these pycnidia are
bacilliform, measuring 5–5.5 x 1 μm. == Chemistry ==