Rhadinosteus
Rhadinosteus parvus is an extinct species of frogs that lived during the Late Jurassic. Fossils of the species were found at the Rainbow Park site in Utah's Dinosaur [National Monument], from several slabs of rock which contain multiple partial specimens, from sediments belonging to the Morrison Formation. R. parvus was likely a member of Pipoidea and may have been a member of the family Rhinophrynidae.