Chelomophrynus is an extinct genus of prehistoric anurans in the family Rhinophrynidae.[1] A single species is known, Chelomophrynus bayi from the Uintan Wagon Bed Formation of Wyoming.[1] It was probably a subterranean feeder, like the modern member of the family, Rhinophrynus dorsalis. As most burrowing anurans, it likely used its hind feet for digging, thereby entering ground backwards.