Graphis prunicola Vainio (1921a: 73)

Kalb, Jutarat, Lücking, Robert & Kalb, Klaus, 2018, The lichen genera Allographa and Graphis (Ascomycota: Ostropales, Graphidaceae) in Thailand-eleven new species, forty-seven new records and a key to all one hundred and fifteen species so far recorded for the country, Phytotaxa 377 (1), pp. 448-450 : 448-450

* Graphis prunicola Vainio (1921a: 73) .

Type:— JAPAN. Inaba province : ad corticem Pruni yedoensis, A. Yasuda 182, (TUR-Vainio 27802, not seen; isotype: US!) .

Fig. 7E .

Thallus corticolous, whitish, continuous, finely warty, corticate, glossy. Lirellae prominent, with a basal thalline margin, short to elongate, up to 7 mm long, straight, curved or sinuous, mostly unbranched, but also sparsely irregularly branched, labia convergent, entire, disc concealed, (hossei- morph). Exciple laterally carbonized; hymenium clear; ascospores 8/ascus, hyaline, (5–) 7 (–9)-septate, 30–39 × 6–9 μm; 5-septate, 16 × 6–7 μm (protologue); 30–40 × 9–11 μm ( Lücking et al. 2009).

Chemistry: no lichen substances by TLC (anal. J. Sutjaritturakan).

Distribution and habitat:—Eastern Palaeotropics, reported from Japan (type locality) and here from Thailand for the first time. It is growing on bark of an unidentified tree at 35 m elevation.

Remarks:— Lücking et al. (2009) classified the lirellae as marginata -morph = with thick lateral thalline margin, but the protologue states: “... labiis laevigatis, omnino nudis aut basi angustissime thallino-obductis.” Also Nakanishi et al. (2003) state in the key leading to G. pruinicola : “Ascocarps covered with a thalline margin only near the base”. As this agrees with isotype material in US and with our specimen, we reclassify the lirellae as hossei -morph.

Material from Thailand examined:— Phang-Nga province: Mueang district, tambon Tak Daet , surroundings of Ban Suanprik , on bark of an unidentified tree, 35 m, 08°28’05’’ N, 98°28’58’’ E, 26 April 2012, J. Sutjaritturakan 4207, (hb. K. & J. Kalb 42325) .

Figures

FIGURE 7. A. Graphis omiana (scale = 0.5 mm); B. Graphis persicina (scale = 0.5 mm); C. Graphis pinicola (scale = 0.5 mm); D. Graphis plumierae (scale = 0.5 mm); E. Graphis prunicola (scale = 0.8 mm); F. Graphis schroederi (scale = 1 mm); G. Graphis subducta (scale = 0.6 mm); H. Graphis subhiascens (scale = 1.2 mm).