Micarea sipmanii is a rare species of corticolous (bark-dwelling) lichen in the family Pilocarpaceae.

It was described as a new species in 2009 by the lichenologists Emmanuël Sérusiaux and Brian John Coppins.

[1] The species epithet honours Dutch lichenologist Harrie Sipman.

The type specimen was collected by the first author from the Riviere duy Grand Carbet, (Basse-Terre, Guadeloupe), where it was growing in a wet forest.

Its primary morphological characteristics is its arbuscular (i.e., shaped like or resembling a small tree or shrub) pycnidia, which the authors describe as "spectacular".