Anodontosaurus

Name: Anodontosaurus ‭(‬toothless lizard‭)‬.
Phonetic: An-o-dont-o-sore-us.
Named By: Charles Mortram Sternberg‭ ‬-‭ ‬1929.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Thyreophora,‭ ‬Ankylosauria,‭ ‬Ankylosauridae,‭ ‬Ankylosaurinae.
Species: A.‭ ‬lambei‭ (‬type‭)‬.
Diet: Herbivore.
Size: Unavailable.
Known locations: Canada,‭ ‬Alberta‭ ‬-‭ ‬Horseshoe Canyon Formation.
Time period: Campanian/Maastrichtian of the Cretaceous.
Fossil representation: Skull and partial post cranial remains.

       Although the name Anodontosaurus means‭ ‘‬toothless lizard‭’‬,‭ ‬the teeth were only lost when the holotype skull of Anodontosaurus became compressed during‭ ‬fossilisation.‭ ‬Anodontosaurus was once synonymised with the genus Euoplocephalus,‭ ‬but a re-description of Dyoplosaurus in‭ ‬2009‭ ‬by Arbour et al.‭ (‬also once synonymised with Euoplocephalus‭) ‬led 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 genus.‭
       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.

Further reading
-‭ ‬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.



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