Key Identification Features
- Its apothecia are disc-shaped, range from flat to convex in shape, and feature multiple complex ridges.
- The species' reproductive structures, called apothecia, are distinctive and numerous.
- The species also hosts Lichenostigma epiumbilicariae, a lichenicolous fungus that forms distinctive dark superficial hyphal cords on the upper surface of the thallus.
- McCune and Geiser compare the surface cracks to "sutures in a skull" and note these cracks are a characteristic feature of the species.
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