It belongs to the genus Verrucaria, a group of lichens characterised by their small, flask-shaped fruiting bodies (perithecia) and crustose growth form.

DNA analysis of the internal transcribed spacer region shows a sequence divergence of 6.8–7.4% from its closest relatives, supporting its status as a separate species.

[2] The thallus (lichen body) of Verrucaria kuusamoensis is typically white, grey, or occasionally pale brown.

[2] The perithecia are relatively large for the genus (0.17–0.45 mm in diameter) and are partially to fully immersed in the rock substrate, typically leaving shallow to deep pits.

This relative abundance in a specific area highlights the importance of local geological features, such as the dolomite formations in Oulanka, in supporting unique lichen diversity.