Allographa subdisserpens (Nyl.) 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 subdisserpens (Nyl.) Lücking & Kalb , comb. nov.

Mycobank MB 827668

Basionym: Graphis subdisserpens Nylander, Bull. Soc. Linn. Normandie 7: 175 (1874).

Type :— INDIA. 1 January 1867, Kurz, s.n. (H-Nyl. 7156!, holotype) .

Thallus corticolous, off-white or whitish-gray, continuous, smooth, corticate, dull or somewhat glossy. Lirellae immersed to erumpent, with lateral thalline margin, short to slightly elongate, up to 5 mm long, straight, curved or sinuous, irregularly branched, labia convergent, entire, disc concealed, not visible from above, ( deserpens -morph). Exciple completely carbonized; hymenium clear; ascospores 8/ascus, hyaline, transversely 9–17-septate, 40–70 × 7–10 μm ( Lücking et al. 2009).

Chemistry: no lichen substances by TLC (M. Nakanishi, annotation slip attached to type).

Distribution and habitat:—Eastern Palaeotropics, reported from India (type locality) and Thailand, Trat province ( Vainio 1909). It was not present in our collections.

Remarks:— Allographa subdisserpens is characterized in having deserpens -morph lirellae, a completely carbonized exciple, a clear hymenium and transseptate, medium-sized ascospores. Here, we find the reverse case as described under Graphis stenotera (see below). Vainio (2009) says in his description of A. subdisserpens : “Thallus ... KHO dilute flavescens et demum sat dilute, sed distincte rubescens.” But no lichen substances could be detected by TLC in this species.