Acroscyphus is a fungal genus in the family Caliciaceae. This is a monospecific genus, containing the single fruticose lichen species Acroscyphus sphaerophoroides. It is found in various locations in the cordilleras of western North America, including Mexico and British Columbia, as well as high-elevation, exposed regions of Asia (China, Japan), South Africa, Peru, and Patagonia. Commonly known as crab's eye lichen, it forms distinctive cushion-like growths with finger-shaped branches and has a yellow to orange interior. The species typically grows on exposed rocks or dead wood in harsh, windswept environments.

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