Parmotrema erectociliatum is a rare species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae.

[1] Found on the Galápagos Islands, it was formally described as a new species in 2019 by lichenologists Frank Bungartz and Adriano Spielmann.

The type specimen was collected from Santa Cruz Island near Academy Bay, where it was found growing on a boulder on a talus slope under a ravine.

[2] The upper thallus surface of Parmotrema erectociliatum is whitish gray to ivory and can have a shiny or dull appearance, with some irregular cracking.

The lower surface of the lichen has a narrow, blackened area that is 0.5–1 mm wide, with short, stout, and black rhizines.