Allographa atrocelatoides J. Kalb, 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 atrocelatoides J. Kalb, Lücking & Kalb sp. nov. Fig. 2B .

Mycobank MB 827637

Similar to Allographa atrocelata (A. W. Archer 2001: 161) Lücking & Kalb , comb. nov.

Mycobank MB 827650. Basionym: Graphina atrocelata A. W. Archer, Mycotaxon 77: 161 (2001) ≡ Graphis atrocelata (A. W. Archer) A. W. Archer , Telopea 11 (1): 72 (2005). It differs in having marginata -morph lirellae ( rhizicola -morph in A. atrocelata ) and a smooth, off-white to beige thallus (verrucose and olive-green in A. atrocelata ).

Type:— THAILAND. Phuket province: Thalang district, in the area of Ton Sai reservoir project, on bark of unidentified tree in remnants of a lowland rainforest, 08°01’41’’ N, 98°21’46’’ E, 30 m, 21 April 2012, J . Sutjaritturakan 4006 & U . Siebsri ( RAMK, holotype) .

Etymology:—The species epithet refers to the similarity with A. atrocelata .

Thallus corticolous, off-white to beige, continuous, smooth, slightly glossy or dull. Lirellae prominent, conspicuous, with a thick lateral thalline margin, straight, curved or sinuous, unbranched or irregularly branched, labia convergent, entire, disc not visible from above ( marginata -morph). Exciple laterally carbonized; hymenium clear; ascospores 1/ ascus, hyaline, densely muriform, 90–125 × 20–35 μm, 18–30 × 4–9-septate.

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

Distribution and habitat:—The new species is only known from its type locality where it is growing on the bark of an unidentified tree in a lowland rainforest at 30 m.

Remarks:— Platygramme pudica (Montagne & Bosch, in Montagne 1856: 347) is habitually somewhat similar, but is easily distiguished in having an inspersed hymenium and larger, pale brown ascospores (160–200 × 30–40 μm).

Material from Thailand examined:—see type material .

Figures

FIGURE 2. A. Allographa aquilonia (scale = 1 mm); B. Allographa atrocelatoides (scale = 1 mm); C. Allographa daintreensis (scale = 0.5 mm); D. Allographa elongata (scale = 0.5 mm); E. Allographa kansriana; inlet showing end of a terminally muriform ascospore with a gelatinuous cap (scale = 0.3 mm; scale inlet = 3 μm); F. Allographa macella (scale = 0.5 mm); G. Allographa schummii (scale = 0.5 mm); H. Allographa sitianoides (scale = 0.4 mm).