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Tephromela epichlorina (Vain.) Aptroot & Lücking, comb. nov. (Fig. 5C, D) Lecanora epichlorina Vain., Acta Societatis pro Fauna et Flora Fennica 7 (1): 91 (Vainio 1890). HOLOTYPE. — Brazil. Minas Gerais, Catas Altas, Caraça, alt. 1400- 1500 m, on moss on sandstone, 1885, E. Vainio distributed in Lichenes Brasilinses Exsiccati 164 (holo-, TUR [TUR-VAIN 5645]). ADDITIONAL SPECIMEN EXAMINED. — Brazil. Minas Gerais, Catas Altas, Caraça, on sandstone, 1997, Aptroot 41012 (ABL, SP). CHEMISTRY. — Thallus UV+ yellow, C-, P-, K-, apothecium margin UV+ yellow. With lichexanthone. ECOLOGY AND DISTRIBUTION. — On sandstone in Campo rupestre in Caraça, Minas Gerais, Brazil; known only from Brazil. MYCOBANK. — MB 846230. DESCRIPTION Thallus crustose, mineral to greenish-grey, rimose to verrucose, somewhat glossy, c. 0.3 mm thick, areoles 0.5-1 mm in diam. Prothallus absent. Apothecia present, sessile, roundish to lobate when old, numerous on the center of the thallus. Disk black, 0.5-1.5 mm in diam., flat, epruinose. Thalline margin concolorous with the thallus, glossy, 0.15-0.2 mm wide, raised above the level of the disk, crenate. Hymenium c. 100-150 µm thick, hyaline. Subhymenium c. 200 µm thick, dark orange brown. Epihymenium dark blue to black, c. 60 µm thick, pigment unchanged in K. Asci slightly clavate, 8-spored. Ascospores simple, hyaline, ellipsoid, 9-15 ×5-6 µm, wall 1-2 µm thick. Pycnidia not observed. DISCUSSION This species was described in Lecanora but on account of the anatomical and chemical characters belongs in Tephromela, as also suggested by an annotation label by Klaus Kalb. For differences with T. carassensis (Vain.) Aptroot & Lücking, comb. nov. and T. xanthonica Guzmán-Guillermo, sp. nov., see Discussion under T. carassensis (Vain.) Aptroot & Lücking, comb. nov. and in the key below. |
