Pertusaria uttaraditensis is a rare species of corticolous (bark-dwelling), crustose lichen in the family Pertusariaceae.

[1] Found in Thailand,[2] it was formally described as a new species in 2005 by Sureeporn Jariangprasert.

The type specimen was collected from Phu Soi Dao National Park (Nam Pat district, Uttaradit province) at an elevation of 1,020 m (3,350 ft), where it was found growing on a foetid vine near a dry dipterocarp forest.

The species epithet combines the province of the type locality with the Latin suffix -ensis ("place of origin").

[3] The lichen has a smooth and dull, olive-green thallus with soredia, but lacking isidia.