Wikipedia
Rhadinosteus
Rhadinosteus parvus (meaning "long slender bone") is an extinct species of prehistoric 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. R. parvus was likely a member of Pipoidea and may have been a member of the Rhinophrynidae family.