Iguanodon

Iguanodon (ĭgwănˈədŏn) [key] [Gr.,  =  iguana tooth], herbivorous ornithiscian dinosaur, characterized by teeth similar to those of the iguana, a horny beak, spikelike thumbs, and a powerful tail. It may have been capable of walking on either two or four feet. Fossils remains of the 30-ft-long (9-m) reptile have been found in Europe, Asia, Africa, and the W United States in strata of the early Cretaceous period, approximately 135–110 million years ago. It possessed characteristic spikelike thumbs. Iguanodon, the second dinosaur to be formally named, was first described by Gideon Mantell, an English physician and geologist. He credited his wife, Mary Ann Woodhouse Mantell, with the discovery. An impressive find by miners in a Belgian coal mine in 1878 turned up more than 20 nearly complete fossil skeletons.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on Iguanodon from Fact Monster:

  • Chordata - Chordata Chordata , phylum of animals having a notochord, or dorsal stiffening rod, as the chief ...
  • Dinosaur Hall of Fame - Dinosaur Hall of Fame Information Please's informal guide to the biggest, smallest, fastest, ...
  • Classification of the Dinosaurs - Classification of the Dinosaurs Dinosaurs (“terrible lizards”) belong to a large group ...
  • How many types of dinosaurs are known? - How many types of dinosaurs are known? Approximately 700 species have been named. However, a recent ...
  • EARLY DISCOVERIES - Dinosaur fossils have been emerging from the rocks for millions of years, and people have been collecting them long before they knew what creatures th

See more Encyclopedia articles on: Vertebrate Zoology