Xanthomendoza rosmarieae is a species of lichen in the family Teloschistaceae. Known only from the type locality in Sussex County, Delaware, it was described as new to science in 2011. It is named after the Swiss lichenologist Rosmarie Honegger. References Teloschistales Lichen species Lichens described in 2011 Lichens of North America Taxa named by Ingvar Kärnefelt Taxa named by Sergey Kondratyuk