Rhizocarpon ozsoyae is a species of saxicolous (rock-dwelling), crustose lichen in the family Rhizocarpaceae.

[1] Found on Antarctica's James Ross Island, it was formally described as a new species in 2022.

Rhizocarpon ozsoyae is distinguished from other species within the Rhizocarpon geographicum group primarily by its predominantly smaller, single-septum ascospores.

Additionally, it is unique among nearly all species in the group due to its production of norstictic acid.

This Lecanoromycetes-related article is a stub.