The type specimen was collected along the Savage River Pipeline Road, where it was found at the edge of a rainforest growing on Nothofagus cunninghamii.

The specific epithet refers to the Tarkine, an area containing the biodiverse Savage River National Park in northwest Tasmania.

[1] The lichen has a foliose, pale grey-white thallus that is tightly attached to its twig substrate, extending to about 6 cm (2.4 in) in diameter.

The thallus surface lacks isidia and soredia, and has only a few roundish perforations, which are about 0.2–0.5 mm wide.

Apothecia are scattered on the surface; they are flat, measuring about 6 mm (0.24 in) in diameter, and have an orange-brown to brown disc.