It is known to occur only in a single locality in the North Caucasus region of Southern Russia, where it grows parasitically on the foliose lichen Parmelia sulcata.

Nanostictis caucasica was formally described as a new species in 2017 by Russian lichenologist Mikhail Zhurbenko.

The type specimen was collected from a northern spur of Gora Armovka, a mountain in Krasnodar Krai.

[1] The fungus produces cup-shaped apothecia that are 250–600 μm in diameter; they emerge through the thallus surface of the host until they are about half or more exposed.

They have a dull white, persistent margin that is grainy due to the crystal depositions on the surface.