- Source: List of geometrid genera: R
The very large moth family Geometridae contains genera beginning with A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y and Z.
Those beginning with R include:
References
Pitkin, Brian & Jenkins, Paul. "Search criteria Family: Geometridae Genus: starts with R". Butterflies and Moths of the World. Natural History Museum, London.