Coccotrema porinopsis (Nyl.) Imshaug ex Yoshim.
Verrucaria porinopsis Nyl., J. Linn. Soc. Lond. Bot. 20: 68 (1883).
Pertusaria thelioplaca Nyl., C. r. hebd. Séanc. Acad. Sci. Paris 88: 90 (1876).
P. adveniens Nyl., Lich. N.Z.: 70 (1888).
P. adventans Nyl., Lich. N.Z.: 70 (1888).
Pertusaria thelioplaca. Holotype: New Zealand. Campbell I. Filhol, 1874, H-NYL 23550!
Pertusaria adveniens. Holotype: New Zealand. Westland, Greymouth. R. Helms 267, 1886, H-NYL 23577!
Pertusaria adventans. Type: New Zealand. Greymouth. R. Helms, H-NYL - not seen.
Thallus crustose, spreading, 0.08-0.2 mm thick, of crowded, unequal, small granules and isidia, corticolous, rarely saxicolous. Upper surface whitish-grey or creamish-brown, without a definite margin, generally with cephalodia and isidia. Cephalodia plane to subglobose, dark pinkish-cream. Isidia cylindrical, to 0.8 mm tall and 0.1 mm thick, corticate, simple or branched, Apothecia immersed singly in small subglobose warts, to 1 mm diam., thalline margin isidiate, apically perforate, ringed with a pale pinkish-cream proper margin. Ascospores 8 per ascus, colourless, simple, ellipsoid, 40-70 × 20-30 µm with a wall 2.5-4 µm thick. Chemistry: K + yellow → red, C-, KC+ red, Pd+ orange. Stictic, norstictic and salazinic acids.
N: (Three Kings Is to Auckland). St: (Anchorage I., Port Pegasus). In coastal forest as an epiphyte of Metrosideros excelsa and Weinmannia racemosa. Still poorly collected and badly understood in New Zealand.
Western Pacific
