Schismatomma occultum (C.Knight & Mitt.) Zahlbr.
Platygrapha occulta Knight et Mitten, Trans. Linn. Soc. Lond. 23: 104 (1860).
P. microsticta Knight et Mitten, Trans. Linn. Soc. Lond. 23: 103 (1860).
P. occulta f. evolutior Nyl., Lich. N. Z.: 119 (1888).
P. occulta f. decolorescens Nyl., Lich. N.Z.: 119 (1888).
Lectotype: New Zealand. Auckland, Sine loco. Charles Knight 267/a, 1858 BM!
Thallus greyish or whitish-grey to sordid greyish-brown, very thin, often blotchy, roughened-uneven, minutely areolate-cracked, in irregular patches, 1-8 cm diam., limited by a thin, black prothallus, corticolous. Apothecia delicate, small ± innate, erupting through cortex, irregularly sulcate, sigmoid or stellate to ± rounded 0.5-1.5 mm long and 0.05 mm wide, thalline margin, slightly raised, thin, whitish, disc black carbonaceous, epruinose, roughened. Hypothecium brown. Epithecium granular, olive-black. Ascospores acicular, 3-septate, 32-40 × 1.5-2.5 µm. Chemistry: Nil.
N: Auckland (Knight, - BM). Wellington (Knight, -BM, H-NYL, WELT).
Endemic
