Schistophoron muriforme

Schistophoron muriforme is a species of corticolous (bark-dwelling), crustose lichen in the family Graphidaceae, first described in 2016. Found in Sri Lanka, it is characterised by its pale yellowish-white thallus and.

Taxonomy
Schistophoron muriforme was formally described by the lichenologists Gothamie Weerakoon and André Aptroot in 2016. The type specimen was collected in Morningside, Sri Lanka, on the bark of a tree in April 2015.

Schistophoron muriforme is the only member of Schistophoron that has   and produces the substance psoromic acid.

Description
The thallus of Schistophoron muriforme is, continuous, not , dull, and pale yellowish-white, surrounded by a usually diffuse brown. The algal partner in this lichen is. are sessile, or ellipsoidal or branched. They are about 0.3–0.5 mm wide, 0.3–0.4 mm high, and 0.7–1.5 mm long, and have a margin that is white and about 0.2 mm wide. The is pale brown, and the  is hyaline. The is not  and hyaline, with  2–2.5 μm wide, and the area above the  is completely filled with. are brown,, 3–7 by 2–4-septate, spherical to ellipsoid, measuring 15–30 by 15–18 μm, with rounded. were not observed to occur in this species.

The reaction of the thallus of Schistophoron muriforme to standard chemical spot tests is UV−, C−, K−, KC−, and Pd+ (yellow). Thin-layer chromatography analysis detected psoromic acid.

Distribution and habitat
This species is found on trees in wet tropical mountain forests and is only known to occur in Sri Lanka.