Naevia punctiformis (Ach.) Beltr.

The thallus is thin and indistinct; however, it often discolors the host bark white to pale cream. The margin is not determinate or bordered by a thin brown line. Photobionts are absent.

The apothecia are either level with the thallus or indistinctly raised, brownish black, and without pruina. Their shape varies from rounded, elliptical or angular to long elongate or even indistinctly branched. They are 0.2–2.0 × 0.2–1.2 mm in size and 50–100 μm tall. The disc is flat to slightly convex and matt or weakly glossy. A thin layer of bark tissue is often observed along the apothecial margin, and patches of host bark may be present on the apothecial disc as well.

The epithecium is 5–20 μm tall and olive-brown in color.

The hymenium is colorless and 35–70 μm tall.

The hypothecium is unpigmented and up to 15 μm tall.

The paraphysoids are 1–1.5 μm wide. Their tips are slightly widened to 2–2.5 µm.

The asci are obovoid to subglobose, without stipe, 25–47 × 18–30 µm, and 8-spored.

The spores are colorless, narrowly obovoid to obovoid, 14–25 × 5–9 μm in size, and divided by 3–5 transverse septa. An enlarged and undivided apical cell is not developed. 

Pycnidia are brownish black, immersed in the thallus, and ca 100 µm in size. The wall is olive-brown. The rod-shaped conidia are 5–7 × ca. 1 μm in size.

The thallus does not react with C, K, KC, Pd, or UV (C–, K–, KC–, Pd–, UV–). Lichen secondary compounds have not been detected by TLC. 

The hymenium reacts I+ blue (or blue mixed with red) and KI+ blue. A KI+ blue ring structure has been observed in the asci.

The brown pigment in the epithecium and in the wall of the pycnidia changes to greenish in K solution.