Graphis schroederi Zahlbruckner (1921: 228)

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 schroederi Zahlbruckner (1921: 228) .

Type:—AFRICA. East-Usambara: near Amani, on tree trunks, 800 m, B. Schröder 160, (W!).

Fig. 7F .

Thallus corticolous, greenish white or lead gray, continuous, smooth, slightly uneven, corticate, glossy. Lirellae immersed to erumpent, often crowded, with a thick, apically complete thalline margin, short to elongate, up to 4 mm long, straight or curved, simple or scarcely branched, labia convergent, entire, disc concealed, not visible from above, ( subserpentina -morph). Exciple completely carbonized; hymenium clear; ascospores 8/ascus, hyaline, transversely 13–15-septate, 74–80 × 12–14 μm; 70–90 × 10–14 μm ( Lücking et al. 2009, holotype); 13–22-septate, 70–90 (–130) × 14–17 μm ( Joshi et al. 2013).

Chemistry: stictic acid (major), cryptostictic acid (submajor), constictic acid (minor), peristictic acid (major), hypostictic acid (minor), (anal. K. Kalb).

Distribution and habitat:—Palaeotropical, reported from Africa (type locality), Vietnam ( Joshi et al. 2013), and here from Thailand for the first time.

Remarks:—As usual, the spore size is variable within species having medium- to large-sized ascospores. Here, we present an extented chemistry of this species for the first time.

Material from Thailand examined:— Chiang Rai province: Mae Fa Luang district, tambon Mae Fa Luang, Mae Fa Luang Garden ( Queen’s village ), on bark of a fallen branch of an unidentified tree, 1380 m, 20°19’34’’ N, 99°50’04’’ E, 5 December 2016, J. & K. Kalb s.n. (hb. K. & J. Kalb 41779) .

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).