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 Add this item to the list  833378 Original description
   
Remarks (public):Ecology and distribution: Known only from the Galapagos; occurs on exposed basalt lava in the humid and upper transition zone. Notes: With its small bullate granules developing paler soredia along their margin, L. subaureoides is morphologically very similar to L. subaurea, a species with a temperate distribution. Lecanora epanora, another temperate species, is also similar but produces laminal rather than lateral soralia. Both L. subaurea and L. epanora are bright neon-yellow as they contain rhizocarpic acid and exhibit UV+ deep orange, but the thalli of L. subaureoides are much paler, yellowish green due to the usnic acid present. The thalli of L. subaureoides often lack apothecia and can then be confused with the superficially similar Bryonora granulata Fryday, a species first described from the Falkland Islands, here now also reported for the Galapagos [Volcán Cerro Azul, Spielmann, A.A. 10511 A (CDS 51867); Bungartz, F. 10356 (CDS52330), 10386 (CDS 52356)]. In addition to usnic acid, B. granulata also contains 2'-O-methylperlatolic acid (Galapagos specimens and the type material analyzed by J.A. Elix). 
Description type:Original description 
Description:Thallus saxicolous, moderately thickened, areolate, areoles ±granular with subsquamulose margins; surface dull yellowish green, matt to ±shiny, epruinose, soralia marginal, extruding granular, almost subcoralloid, pale yellowish green soredia along the edges of individual areoles; prothallus absent or indistinct. Apothecia sparse, typically not much larger than the thalline areoles, circular to irregular, 0.1–0.7 mm in diam., adnate, barely emerging from the thallus surface and often indistinct among the subsquamulose areoles, with an indistinct lecanorine margin that becomes excluded with age or in part disintegrating into soredia; disc plane to convex, dull greenish or olivaceous, generally deeper in color than the surrounding thallus, shiny, epruinose; hymenium hyaline, not inspersed, but occasionally with sparse oil droplets; epihymenium with small orange brown granules, soluble in K, lacking distinct crystals, fuscous brown (elachista-brown: dissolving in K, HCl± dull greenish, N−); proper exciple thin, indistinct, with few small crystals; thalline exciple densely filled with small and medium-sized crystals that are insoluble in K; subhymenium and hypothecium hyaline; asci and ascospores not seen. Pycnidia not seen. Chemistry: K± brownish, C-, KC± brownish, P-, UV-; only contains usnic acid [major]. 
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