デイル・ラッセル
"Betasuchus" is known only from a single incomplete femur, so its exact relationships with other theropods have been difficult to determine. In 1972 Dale Russell confirmed Von Huene's opinion that "Betasuchus" was an ornithomimosaurid, but also considered the name a "nomen vanum": a failed emendation. Some workers in reference to the material still use "M. bredai" instead of "Betasuchus". David Norman in 1990 listed "Megalosaurus bredai" as a "nomen dubium".