Chapsa microspora is a species of corticolous (bark-dwelling), crustose lichen in the family Graphidaceae.

Its thin thallus (the main body of the lichen) appears light grey to whitish and has a smooth, continuous surface roughly 20–50 μm thick.

These apothecia have distinctive raised margins that are deeply split and usually curl backward, revealing a pale grey to white felty inner surface.

The central disc is pale brown and covered with a white, powdery coating (pruina).

The thread-like structures (paraphyses) within are unbranched, straight, and 2–2.5 micrometers wide, with tips that may be slightly beaded or branched.