Named By: Charles Mortram Sternberg - 1929.
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, Thyreophora, Ankylosauria, Ankylosauridae, Ankylosaurinae.
Species: A. lambei (type).
Known locations: Canada, Alberta - Horseshoe Canyon Formation.
Time period: Campanian/Maastrichtian of the Cretaceous.
Fossil representation: Skull and partial post cranial remains.
the name Anodontosaurus means ‘toothless
lizard’, the teeth were
only lost when the holotype skull of Anodontosaurus
during fossilisation. Anodontosaurus was once
synonymised with the
but a re-description of Dyoplosaurus
by Arbour et al. (also once synonymised with Euoplocephalus)
to the original Anodontosaurus fossils being
re-established as a
distinct genus by Victoria Arbour in 2010. New studies since this
time further support the description of Anodontosaurus
as a distinct
As an ankylosaurid dinosaur, Anodontosaurus would have been a quadrupedal herbivore that was covered in bony armour along the back and sides while possessing a bony club on the end of its tail. These things combined would have formed the main defence against late Cretaceous predators.
Anodontosaurus likely shared its habitat with the nodosaur Edmontonia, ceratopsians such as Anchiceratops and Pachyrhinosaurus and hadrosaurs such as Hypacrosaurus and Saurolophus. Other kinds of dinosaur such as Ornithomimus were also present, but it was the larger predators such as tyrannosaurs like Albertosaurus that Anodontosaurus would have to keep a special watch for.
- A toothless armoured dinosaur from the Upper Cretaceous of Alberta, Charles Mortram Sternberg - 1929.
- A redescription of the ankylosaurid dinosaur Dyoplosaurus acutosquameus Parks, 1924 (Ornithischia: Ankylosauria) and a revision of the genus, V. M. Arbour, M. E. Burns & R. L. Sissons - 2009.
- A Cretaceous armoury: Multiple ankylosaurid taxa in the Late Cretaceous of Alberta, Canada and Montana, USA, Victoria Arbour - 2010.