Arthothelium suffusum (C.Knight) Müll.Arg.
Arthonia suffusa Knight, T.N.Z.I. 15: 353 (1883).
Lectotype: New Zealand. Sine loco, ?Wellington. Charles Knight, BM!
Thallus grey-white, granular-scurfy or ± minutely pruinose in parts, areolate, areolae minute, angular, convex, surface minutely warted-wrinkled, separated by very fine lines, spreading in patches 3-5(-8) cm diam., irregularly delimited by a thin, black, marginal line. Ascocarps 1-2 per areola, minute 0.1-0.3(-0.5) mm diam., crowded, blackish, often white-pruinose, pruina coarse, rounded to irregular. Ascospores oval to oblong, 8-10-locular, 33-28 µm.
N: Known only from the type collection but probably ± widely distributed on bark of Dacrydium cupressinum.
Endemic
