Arthonia diaphora Stirt.
Lectotype: New Zealand. Near Wellington. J. Buchanan, August 1876, GLAM!
Thallus pale whitish to creamish or greyish, minutely papillate-warted rather cobwebby in parts, delicately and continuously areolate-cracked, delimited by a fine black line, in mosaics, 3-6 cm diam., corticolous. Ascocarps 0.2-1 mm diam., scattered, rather sparse, brown-black to black, matt, carbonaceous, ± hemispherical, slightly wrinkled. Ascospores 2 per ascus, ellipsoid, 1-septate, 40-56 × 25-32 µm.
N: S: Widespread on bark of Dacrydium cupressinum.
Endemic
