Graphis subinsulana Poengsungnoen & Kalb (2014: 259)

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 subinsulana Poengsungnoen & Kalb (2014: 259) .

Type:— THAILAND. Loei: Phu Luang Wildlife Sanctuary, Nam Kai Ranger Station , in a mixed deciduous forest, on an unidentified tree, 335 m, 17º06’37.9” N, 101º38’28.2” E; 22 June 2010, V . Poengsungnoen VP 00673 ( RAMK 012869 !, holotype) .

Thallus corticolous, whitish gray to grayish green, continuous, smooth to uneven, thinly corticate, dull. Lirellae prominent, with thick complete thalline margin, very short to short, up to 3 mm long, straight, simple, labia convergent, entire, not visible from outside, disc concealed, (cleistomma- morph). Exciple laterally carbonized; hymenium strongly inspersed (type A); ascospores 1/ascus, hyaline, densely muriform, halonate, with 25–40 transverse septa and 2–10 longitudinal septa, 80–150 × 25–40 μm.

Chemistry: norstictic acid (major), connorstictic acid (minor) (anal. K. Kalb).

Distribution and habitat:— Graphis subinsulana is rather common in North-East Thailand, Loei province where it was collected in dry dipterocarp forests, lower montane scrubs, lower montane rainforests and mixt deciduous forests between 330 and 925 m elevation.

Remarks:—This species is similar to G. novopalmicola , but the latter has subserpentina -morph lirellae.

Material from Thailand examined:— Chiang Rai province: Mae Chan district, tambon Pa Tueng, surroundings of Huai Kang Pla Waterfall , in a dry, mixed evergreen forest with Pinus kesiya , 600 m, 20°05’29’’ N, 99°46’54’’ E, 6 December 2016, J. & K. Kalb s.n. (hb. K. & J. Kalb 41817) .