Claosaurus Annectens

Edmontosaurus Annectens - Discovery and History - Early Classifications
... at the time, following Marsh's death in 1897 Claosaurus annectens was variously classified as a species of Claosaurus, Thespesius or Trachodon ... drew a distinction between the "Iguanodon-like" Claosaurus annectens and the "duck-billed" Hadrosaurus (based on Cope's Diclonius mirabilis), while Hatcher explicitly identified C ... annectens as synonymous with the hadrosaurid represented by those same duck-billed skulls, the two differentiated only by individual variation or distortion from pressure ...