Allographa rimulosa (Mont.) Lücking & Kalb 2018

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

Allographa rimulosa (Mont.) Lücking & Kalb , comb. nov.

Mycobank MB 827661

Basionym: Opegrapha rimulosa Montagne, Ann. Sci. Nat. Bot. : 271 (1842).

Type :— GUYANA, Leprieur 200 ( P, not seen, lectotype, designated by Wirth & Hale 1978: 21) .

Thallus corticolous, off-white or gray, continuous, smooth or slightly uneven, thinly corticate, dull. Lirellae erumpent to prominent, without a thalline margin, short, up to 4 mm long, slender, straight, curved or sinuous, usually simple or rarely branched, labia convergent, striate, black, disc concealed, (striatula- morph). Exciple completely carbonized; hymenium clear; ascospores 8/ascus, hyaline, transversely 10–14-septate, 37–56 (–67) × 10–12 μm; 7–12-septate, 28–55 × 7–10 μm (Archer 2009).

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

Distribution and habitat:—Pantropical; reported from U.S. A. Florida ( Seavey et al. 2017), Dominica, Guyana, Brazil, Indonesia, Taiwan ( Aptroot & Sparrius 2008 –present), Hawaii (Archer 2009) and for the first time from Thailand, Loei province from Poengsungnoen et al. (2010) where it was collected in lower montane scrub and lower montane rainforest. The reference to this species in Buaruang et al. (2017), citing Pitakpong et al. (2015), is not from Thailand, but from the Philippines.

Remarks:—Externally identical is Graphis duplicata (see above), but this species differs in having a laterally carbonized exciple.

Material from Thailand examined:—Phang-Nga province: Mueang district, in the area of Soan Somdet Srinagarindra Thara, on bark of an unidentified tree in a tropical rainforest, 15 m, 08°25’59’’ N, 98°31’06’’ E, 29 April 2012, J. Sutjaritturakan 4349, 4354 (hb. K. & J. Kalb 42446, 42450)— Phuket province: Thalang district, in the area of Kho Tosae, in a teak plantation ( Tectona grandis ), 170 m, 07°53’58’’ N, 98°23’57’’ E, 24 April 2012, J. Sutjaritturakan 4104, 4112.2, 4170 (hb. K. & J. Kalb 42447, 42444, 42445)— Trang province: Palian district, tambon Suso, in the area of tambon Suso Moo 1, in a rubber tree plantation ( Hevea brasiliensis ), 25 m, 07°15’29’’ N, 99°40’44’’ E, 22 May 2009, J. Sutjaritturakan 2948, 2954 & S. Siemmai (hb. K. & J. Kalb 42449, 42448).