Micarea pauli is a species of corticolous and lignicolous (bark- and wood-dwelling), crustose lichen in the family Pilocarpaceae.

The species epithet pauli refers to Polish lichenologist Paweł Czarnota, who, according to the authors, is a "specialist in the genus who monographed it in Poland".

[1] Micarea pauli has an indeterminate crustose thallus that grows within or on its bark substrate, appearing as a greenish film.

Apothecia occur rarely; when present, they are beige with spots of grey pigment measuring up to 0.5 mm in diameter.

[1] Micarea aeruginoprasina and M. nigra are somewhat similar in morphology, but can be distinguished from M. pauli by differences in apothecial pigmentation.