Graphis assimilis Nylander (1868: 109)

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 assimilis Nylander (1868: 109) .

Type :— NEW CALEDONIA. Lifu, ad cortices arborum, 1856, Vieillard 1848 (H-Nyl. 7125!, lectotype, designated by Lücking et al. 2008: 69) .

Thallus corticolous, whitish, off-white to whitish gray, continuous, smooth, dull. Lirellae immersed to erumpent, with a lateral thalline margin, short and sparsely branched, labia convergent, entire, not pruinose, disc not visible from above ( lineola -morph). Exciple completely carbonized; hymenium clear; ascospores 8/ascus, hyaline, transversely septate, 7–9-septate, 25–32 × 6–7 μm (protologue), 7–11-septate, 30–45 × 6–11 μm ( Lücking et al. 2009).

Chemistry: norstictic acid (anal. J. Sutjaritturakan).

Distribution and habitat:—Pantropical, known from the U.S.A. (Florida; Lücking et al. 2011), Madagascar (Aptroot 2016) and the eastern palaeotropics, including Indonesia, Singapore, Papua New Guinea ( Aptroot & Sparrius 2008 –present), New Caledonia, Vanatu, Australia (Archer 2009) and Thailand, Loei province ( Poengsungnoen et al. 2010).

Remarks:—There is already a reference to this species in Nylander (1857: 150) where the author stressed the similarity with Graphis scripta (L.) Ach., stating that the two species only differ in a laterally carbonized exciple in the latter and a totally carbonized exciple in G. assimilis . Further differences include secondary chemistry.

Material from Thailand examined:— Phang-Nga province : Mueang district, in the area of Suan Somdet Srinagarindra Thara, on bark of an unidentified tree in a tropical rainforest, 08°25’59’’ N, 98°31’06’’ E, 15 m, 29 April 2012, J. Sutjaritturakan 4346, 4347 (hb. K. & J. Kalb 42416, 42414) .