Anzia colpodes, commonly known as the black foam lichen, is a species of corticolous (bark-dwelling), foliose lichen in the large family Parmeliaceae.

[2] It occurs in eastern North America.

The lichen was first formally described as a new species by the Swedish lichenologist Erik Acharius in 1799.

[3] He classified it in the eponymous genus Lichen, which was standard at the time.

[4] Ernst Stizenberger transferred it to the genus Anzia in 1862.