Ramonia vermispora is a species of saxicolous (rock-dwelling) and crustose lichen in the family Gyalectaceae.

Found in the Sonoran Desert region of the southwestern United States, it was formally described as a new species in 2008 by lichenologists James Lendemer and Karry Knudsen.

The type specimen was collected in San Bernardino National Forest (Riverside County, California), at an elevation of 1,655 m (5,430 ft); here it was found growing on granitic rock in a shaded rocky outcrop in a woodland.

The lichen is only known to occur at the type locality, which is part of the San Jacinto Mountains.

Similar species include R. ablephora and R. gyalectiformis, both of which can be distinguished from R. vermispora by ascospore morphology.