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Welcome to our ANODONTOSAURUS entry...
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ANODONTOSAURUS

a herbivorous ankylosaurid dinosaur from the Late Cretaceous of Canada.
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Pronunciation: an-o-DONT-o-SOR-us
Meaning: Toothless lizard
Author/s: C.M. Sternberg (1929)
Synonyms: None known
First Discovery: Alberta, Canada
Chart Position: 122

Anodontosaurus lambei

When Charles Mortram Sternberg named Anodontosaurus (toothless lizard) in 1929 he thought it was the "first toothless member of the Stegosauria to be recorded"... except it did have teeth, they were just pushed out of their sockets by crushing during preservation... and it isn't actually a stegosaurid, it's a member of Ankylosaurinae. It's also one of three armour-clad North American brethren that were recently pulled from the brink of oblivion.

In 1978 Walter Coombs was so convinced that there was just one type of ankylosaur present in the Maastrichtian of western North America that he sank Anodontosaurus, Dyoplosaurus and Scolosaurus into Euoplocephalus tutus. But one by one their distinct features were singled out, first by Victoria Arbour in 2009, and later by Paul Penkalski and others, and by 2013 they were all rescued and ressurected as valid critters worthy of their own names. At this point, Oohkotokia was plucked and raised from Euoplocephalus too but, funnily enough, its remains may actually belong to Scolosaurus.
(Lambe's toothless lizard) Etymology
Anodontosaurus is derived from the Greek "an-" (not, without), "odont" (tooth) and "sauros" (lizard). The species epithet, lambei, honours Canadian geologist and palaeontologist Lawrence Morris Lambe (1863-1919).
Discovery
The remain of Anodontosaurus were discovered in the Horseshoe Canyon Formation, 8 miles southwest of Morrin, Alberta, Canada, by Charles Mortram Sternberg in 1916.
The holotype (CMN 8530) is a badly crushed partial skeleton.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Campanian-Maastrichtian
Age range: 73-67 mya
Stats:
Est. max. length: 5 meters
Est. max. hip height: ?
Est. max. weight: 2 tons
Diet: Herbivore
References
• Sternberg, C.M. (1929) "A toothless armoured dinosaur from the Upper Cretaceous of Alberta".
• Carpenter, K., (2001) "The Armored Dinosaurs".
• Arbour, V.M., Burns, M.E., and Sissons, R.L., (2009) "A redescription of the ankylosaurid dinosaur Dyoplosaurus acutosquameus Parks, 1924 (Ornithischia: Ankylosauria) and a revision of the genus".
• Arbour V.M., and Currie P.J., (2013) "Euoplocephalus tutus and the Diversity of Ankylosaurid Dinosaurs in the Late Cretaceous of Alberta, Canada, and Montana, USA".
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To cite this page:
Atkinson, L. "ANODONTOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 19th Oct 2017.
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