Allographa kansriana 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 kansriana J. Kalb, Lücking & Kalb , sp. nov. Fig. 2E .

Mycobank MB 827638

Similar to Allographa aquilonia , but differs in having negrosina -morph lirellae (illinata -morph in A. aquilonia ) and ascospores which become brownish with age.

Type:— THAILAND. Chiang Rai province: Chiang Saen district, tambon Mae Ngen , trail from main-road to Wang Than Tong Waterfall , on roadside trees, 430 m, 20°18’22’’ N, 100°16’14’’ E, 9 December 2016, J. & K. Kalb 42023 ( RAMK, holotype) .

Etymology:—The new species is named in honour of Assoc. Prof. Dr. Kansri Boonpragob, leader of the Lichen Research Unit at Ramkhamhaeng University for her outstanding contributions to lichenology in Thailand.

Thallus corticolous, whitish or greenish white, up to 5 cm diam., 150–200 μm thick, continuous, corticate, prothallus indistinct, surface smooth, dull or slightly glossy. Thallus in section with distinct upper cortex, up to 35 μm high, with irregular algal layer up to 100 μm high, medulla with clusters of crystals. Lirellae erumpent with thick lateral and thinner apical thalline margin, short to elongate, up to 2 mm long and ca. 0.3 mm wide, 0.3 mm high, straight, curved or sinuous, irregularly branched, labia convergent, entire, dark gray, not pruinose, disc closed, not visible from above (negrosina- morph). Exciple completely carbonized, 25–100 μm wide; hypothecium 25–30 μm high, pale brownish or hyaline; hymenium up to 200 μm high, clear, epihymenium dark brown. Paraphyses unbranched; asci elongate claviform, ca. 150 × 25 μm. Ascospores 4–6/ascus, hyaline, transversely 9–21-septate with 1–2 longitudinal septa in the terminal 2–4 locules, 60–110 × 10–12 μm, with a gelatinous cap at both ends ( Figure 2E ., inlet), I+ blue.

Chemistry: norstictic acid (major), connorstictic acid (minor) (anal. K. Kalb).

Distribution and habitat:—So far, the new species is only known from the type specimen, which was collected from a roadsid tree close to a tropical rainforest at 430 m elevation.

Remarks:—In the world key to Graphis species ( Lücking et al. 2009), this new species would would key out in Group 9, “labia entire, excipulum completely carbonized, hymenium clear, ascospores muriform”, couplet 7a, G. aquilonia . However, the new species differs in having negrosina -morph lirellae.

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).