Dysalotosaurus (meaning 'uncatchable lizard') is a genus of herbivorous iguanodontian dinosaur. It was a dryosaurid iguanodontian, and its fossils have been found in late Kimmeridgian age-rocks (Late Jurassic) of the Tendaguru Formation, Tanzania. The type species of Dysalotosaurus is D. lettowvorbecki. D lettowvorbecki was named by Rudolf Virchow in 1919 after the Imperial German Army Officer, Paul von Lettow-Vorbeck. It has long been referred to approximate contemporary Dryosaurus but newer studies reject this synonymy.