Allographa leptospora (Vain.) 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 leptospora (Vain.) Lücking & Kalb , comb. nov.

Mycobank MB 827653

Basionym: Graphis leptospora Vainio, Ann. Soc. Zool. Bot. Fenn. ‘Vanamo’ 1: 53 (1921).

Type:— THAILAND. Chiang Mai province: Doi Suthep, ad corticem arboris, 1904, C. C. Hosseus 1875a (TUR-Vainio 27807!, holotype) .

Thallus corticolous, whitish to whitish gray or gray, continuous, smooth, glossy. Lirellae erumpent to prominent, with persistent, apically thin thalline margin, elongate, straight, curved or sinuous, unbranched or irregularly branched, labia convergent, finely striate, grayish, disc concealed ( acharii -morph). Exciple completely carbonized; hymenium clear; ascospores 8/ascus, hyaline, transversely 29–31-septate, 60–100 × 5–8 μm (protologue), 6–10 μm broad (holotype, Lücking et al. 2009), up to 15-septate, (27–) 40–75 (–100) × (7.2–) 8–9.5 (–11.5) μm ( Lepista & Aptroot 2016).

Chemistry: norstictic acid (major) (M. Nakanishi on identification slip attached to the holotye).

Distribution and habitat:— Thailand, Galapagos Islands and Portugal. This is a rare species and until recently, only the type material was known. Lepista & Aptroot (2016) however reported this species from Europe ( Portugal). It was not present in our collections.

Remarks:—As in many other species with large ascospores, they are variable in size also in A. leptospora .