Allographa marginata (Raddi) 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 marginata (Raddi) Lücking & Kalb , comb. nov.

Mycobank MB 827656

Basionym: Graphis marginata Raddi, Mem. Mat. Fis. Soc. Italiana Sci. res. Modena 18: 344 (1820).

Type:— BRAZIL. Rio de Janeiro state: Serra da Estrela, Corco-secco mountain, Raddi s.n. (FI, not seen) [the data for the collecting locality is taken from the protologue and Costa (2009)] .

Thallus corticolous, off-white, greyish to pale bluish gray or brownish gray, continuous, smooth to uneven, distinctly corticate and glossy. Lirellae prominent, with a thick lateral thalline margin, elongate, straight or curved, not or sparsely and irregularly branched, labia convergent, entire, disc concealed (marginata- morph). Exciple completely carbonized; hymenium clear; ascospores 4–8/ascus, hyaline, transversely 11–25-septate, 60–120 × 9–18 μm ( Lücking et al 2009); 18–21-septate, 96–105 × 10–12 μm ( Adawadkar & Makhija 2006).

Chemistry: norstictic acid (major), connorstictic acid (minor).

Distribution and habitat:—Pantropical, reported from Brazil (type locality), Costa Rica ( Lücking et al. 2008), India ( Awasthi 1991), Borneo (as G. leucoparypha Kremp. ), Taiwan, Papua New Guinea ( Aptroot & Sparrius 2008 – present), Solomon Islands and Australia (Archer 2009). Poengsungnoen et al. (2010) reported this species for the first time from Thailand, Loei province, where it was growing on bark in a lower montane scrub, but it was not present in our collections.

Remarks:—Morphologically and by spore dimensions, A. rustica (Kremp.) Lücking & Kalb (see below) is very similar, but the latter differs in having stictic acid instead of norstictic acid.