1.Previous
3.Next

duckbill genus named by Joseph Leidy, Thespesius is a historically-important genus with a convoluted taxonomy that has been all but abandoned by modern dinosaur paleontologists. Around 1900 the name was used by some authors to indicate all late Maastrichtian hadrosaurids in North America. In 1875, E.D. Cope stated that he considered Agathaumas milo, known from partial limb bones and some vertebrae, to be a synonym of T. occidentalis (which he considered

1.Previous
3.Next