Graphis stenotera Vainio (1921: 243)

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 stenotera Vainio (1921: 243) .

Type:— PHILIPPINES. Luzon: Benguet, Sablang , November–December 1910, E. Fénix, Bureau of Science 12786, (TUR-Vainio 27887!, lectotype, designated by Archer 2006: 86) .

Thallus corticolous or saxicolous, white or ochre-gray, or pale olive green, continuous, smooth, distinctly corticate, glossy. Lirellae erumpent to prominent, lacking a thalline margin, short to elongate, up to 8 mm long, straight, curved or sinuous, simple or rarely irregularly branched, labia convergent, entire, disc concealed, not visible from above, ( striatula -morph). Exciple apically to peripherally carbonized; hymenium clear; ascospores 8/ascus, hyaline, transversely 5–10-septate, 20–36 × 5–8 μm (protologue); 6–9-septate, 25–40 × 5–8 μm ( Archer 2006).

Chemistry: stictic acid (M. Nakanishi, annotation slip attached to type).

Distribution and habitat:—Pantropical, reported from Costa Rica, Taiwan (as G. flabellans ) (both Lücking et al. 2008), India ( Adawadkar & Makhija 2007), Philippines (type locality), Australia (Archer 2009) and for the first time from Thailand, Loei Province from Poengsungnoen et al. (2010) where it was collected in lower montane scrubs and a dry dipterocarp forest. It was not present in our collections.

Remarks:—Vainio (1921) compared his new species with Allographa striatula , but this species can be distinguished in having a laterally carbonized exciple and longer ascospores (up to 65 μm long), (see above). Great care should be taken to elucidate the chemistry by spot tests alone. Vainio says in the protologue; “Thallus ... KHO non reagens, ...” but TLC of the type revealed stictic acid. This phenomen occurs often in species of Graphidaceae that chemical results of spot tests do not concur with TLC results and interestingly also vice versa.