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Polacanthus Reconstruction: Part 8 ‘Keeled Spines’ — Dinosaur...
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The spine is comparable to a spine discovered at Barnes High which formed the basis of a paper by Justin Delair in The spine has a keel which securely imbeds it into the body of the animal. It also has a large depression on the posterior (back) edge which suggests the position of the spine would have been an area with lateral (sideways ...
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