FIGURE 2 in Lecanoroid lichens in the Galapagos Islands: the genera Lecanora, Protoparmeliopsis, and Vainionora (Lecanoraceae, Lecanoromycetes)

FIGURE 2. Species in the L. marginata-group. A–D. Morphological variation of Lecanora austrosorediosa. A–B. Bungartz, F. 4398, CDS 28483–holotype. A. Whitish gray, rimose-areolate thallus with smooth surface and fimbriate margin, apothecia adnate to barely sessile, biatorine, pallid, dark-tinged to sordid-blackened, soralia pustulate, with white granular soredia. B. Pale grey, rimose-areolate thallus with smooth surface and fimbriate margin, apothecia adnate to barely sessile, biatorine, pallid, soralia pustulate, with white granular soredia. C–D. Cream-white rimose-areolate thallus with coarse surface, pustulate soralia with white granular soredia, individual thalli delimited by blackened prothallus lines (Bungartz, F. 6426, CDS 34641). C. Part of the specimen with black apothecia appearing 'lecideine', their margin covered in grayish white pruina. D. Part of the specimen with pallid biatorine apothecia. E–G. Anatomy of L. austrosorediosa (Bungartz, F. 4398, CDS 28483–holotype). E. Section of dark-tinged, biatorine apothecium, outermost exciple and epihymenium with black pigment [in KOH, crystals dissolved, Differential Interference Contrast (DIC)]. F. Section of pallid, biatorine apothecium (in water, abundantly inspersed by minute crystals, DIC). G. Lecanora-type asci, tholus with wide, apically open, unstained central cone and deeply stained ascus flanks (in Lugol's iodine, DIC). Scales: A, B, C & D = 5 mm; E & F = 100 µm; G = 15 µm.