A new lichen genus Teuvoa Sohrabi & S. Leavitt was described. | MYCO-LICH

A new lichen genus Teuvoa Sohrabi & S. Leavitt was described.

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Thallus corticolous to lignicolous, on conifers. Areoles irregular, flat to convex, rather thick, opaque, angular to rounded. Surface grey to whitish grey, with a greenish shade, slightly roughened, e pruinose, up to 2 mm wide. Apothecia numerous, cryptolecanorine or eurceolate when young, becoming lecanoroid or lecideoid when mature, orbicular to slightly angular, simple to frequently composite, up to 10–25 mm wide. Disc concave to plane or slightly convex when mature, brown to brownish black, but whitish to bluish grey by pruine. Thalline exciple e welldeveloped, concolorous with thallus, thin, smooth, not flexuous. True exciple up to 160 mm wide laterally, variable in development and thickness, of e paraplectenchymatous tissue. Epihymenium dark to olive brown, rarely light brownish, pigment N+ green to fairly blue-green, K+ brown to green, up to 30(–40) mm tall, with granular surface, partially soluble in N and K. Hymenium hyaline, I+ persistently blue, (80–)90–145(–160) mm tall, conglutinated. Subhymenium and hypothecium pale, I+ persistently blue. Paraphyses moniliform, usually simple, rarely branched in lower parts and anastomosed, with 1–7 globose to subglobose cells apically. Asci clavate, (65–)70–120(–135)  18–30(–35) mm, 8-spored, apical apparatus thick, K/I--. Ascospores hyaline, simple, (10–)11[129] 14(–16) (13–)16[179]19(–22) mm, (n ¼ 81), ellipsoid to elongate (-cylindrical). Pycnidia usually very common, 1–3(–5) per areole, immersed, often indistinct, occasionally with a white rim, and aggregated, 100– 300 mm diam.; with a brownish or black ostiole, 40–100(–190) mm diam. Conidia 5–8  075–100(–170) mm, bacilliform, straight.
 
Spot test: cortex and medulla K--, C--, KC--, I--, and PD--.
Secondary metabolites: no lichen substances detected.