Notes:
Crustose lichen, on granite, next to Aspicilia simoensis.
THALLUS: effigurate, forming broad mounded rosettes, surface shiny medium brown to paler olive-brown, lobes minute and overlapping and somewhat convex; cortex 30-40 µm, brown in upper half, POL+ white clearing in K, evenly thickened, K-, C-, KC-; medulla seems loose to me since it was difficult to section without just squishing it, POL+ white not clearing in K; algae in a thick uniform layer
APOTHECIA: common, lecanorine; disc chesnut brown, epruinose, somewhat convex, to 1mm or more; rim shiny, even, slightly raised, strongly contorted and flexuous; epihymenium brown, POL+ white clearing in K, K-; hymenium clear, K/I+ blue; hypothecium clear; paraphyses thickish, septate, somewhat swollen near tips, somewhat branched, K/I+ golden, separating easily; asci K/I+ blue tip with relative broad axial canal
SPORE: 8 per ascus, clear, simple, smooth, broadly elliptical

Images

At 30×.
Apothecial section, in water, at 100×..
Apothecial section, in water, at 100x, cross-polarized.

Proposed Names

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Used references: Nash’s Sonoran Flora

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