• Robert L. Carlton


a dubious species of hadrosaurs in the subfamily Saurolophinae. It is so similar to Edmontosaurus that some researchers consider them the same species. A duck-billed dinosaur that lived above the Arctic Circle near the end of the Cretaceous, Ugrunaaluk, bore crests along its spine and is estimated at 25 to 30 feet long and 7 feet high at the hip. Several thousand bones belonging to the species have been found on the Colville River in northern Alaska in strata from 69 Ma. Late Cretaceous.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Robert L. Carlton
    • 1
  1. 1.SalemUSA

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