Allographa sauroidea (Leight.) 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 sauroidea (Leight.) Lücking & Kalb , comb. nov.

Mycobank MB 827664

Basionym: Graphis sauroidea Leighton, Trans. Linn. Soc. London 25: 452 (1866).

Type :— BRAZIL. Amazonas : Obidos, Spruce 331 ( BM!, holotype; H, not seen, isotype) .

Thallus corticolous, off-white to yellowish gray or greenish gray, continuous or slightly cracked, smooth, slightly uneven or tuberculate, corticate, dull or slightly glossy. Lirellae prominent, with a basal or lacking thalline margin, short to elongate, up to 4 mm long, straight or curved, simple or scarcely branched, labia convergent, entire, black, sometimes slightly white pruinose along the slit, disc concealed, ( hossei -morph). Exciple completely carbonized; hymenium clear; ascospores 6–8/ascus, hyaline, transversely 8–15-septate, 45–60 × 10–14 μm, ( Staiger 2002, holotype); transversely 10–11-septate, 32–43 × 7–8 μm, (Vaino 1909, material from Thailand).

Chemistry: lichexanthone (anal. Staiger 2002).

Distribution and habitat:—This species seems to be very rare in Thailand. Only one collection is known from Trat province ( Vainio 1909) and it was never collected again in the country by the many subsequent collectors. Recently it was reported from Florida ( Lücking et al. 2011) .

Remarks:—This species is characterized in having hossei -morph lirellae, a completely carbonized exciple, a clear hymenium, transversely septate, medium-sized ascospores and lichexanthone as a major metabolite.