Flora of New Zealand Series

≡Lecidea campbelliana Nyl., Compt. Rend. Hebd. Séances Acad. Sci. Paris, sér. D, 83: 90 (1876).

=Mycoblastus minor Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 294 (1941).

Holotype: New Zealand. Campbell I., 1874, Filhol – H-NYL 11050 [Dr Orvo Vitikainen, pers. comm.].

Mycoblastus minor. Lectotype: New Zealand. South Auckland, Waiotapu Valley, Rotorua. On Leptospermum scoparium, K.W. Allison 28 – CHR 378615 [fide Galloway (1985a: 298)].

Description : Flora (1985: 297).

N: Auckland (Waitakere Ra.), South Auckland (Waiotapu Valley). A: C: On Leptospermum bark and on dead wood, probably more widespread than records show. Very small and easily overlooked. Often with Haematomma babingtonii and Tephromela atra. Known also from Macquarie I. (Selkirk et al. 1990; McCarthy 2003c, 2006).

Australasian

Illustration : Lumbsch et al. (2001: 28).

Mycoblastus campbellianus is characterised by: the corticolous habit; an effuse thallus of scattered, white soralia; black, convex, lecideine apothecia, 0.2–0.6 mm diam.; a blue-black epithecium; a colourless hymenium 110 μm high; a massive, pale or straw-coloured hypothecium, 350–400 μm thick; 2-spored asci; and ellipsoidal ascospores, 40–50 × 24–28(–32) μm, the wall to 3 μm thick.