Oxneriaria pakistanica

Oxneriaria pakistanica has a crustose, non-zonate thallus that is initially placodioid (lobate) but becomes non-placodioid with age, reaching up to 5 cm across. The areoles are distinctly developed, uncracked, 0.5–1.8 mm wide, and broadly attached to the substrate. The upper surface is dull and epruinose, and whitish grey to greyish in colour. No prothallus is present.^[1]

The apothecia (fruiting bodies) are frequent, aspicilioid, and immersed in the thallus. They measure 0.5–2 mm in diameter and have a black, dull disc. The hymenium is 100–155 μm tall and the hypothecium is 90–170 μm deep. Ascospores are simple, hyaline, broadly ellipsoid to sub-spherical, and measure 10–18 by 7–10 μm.^[1]

Oxneriaria pakistanica is known only to occur in its type locality in the Darel Valley of Gilgit-Baltistan, Pakistan. It was found growing on calcareous sedimentary rocks in a moist temperate climate at elevations around 1,900–2,000 m (6,200–6,600 ft).^[1] It is one of six Oxneriaria species known to occur in Pakistan; the others are O. crittendenii, O. iqbalii, O. kohistaniensis, and O. pruinosa.^[2]