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of the jaws. Its braincase was small, and the neck was composed of at least 15 vertebrae.

Postcranial skeleton

D. hallorum, known from partial remains, was even larger, and is estimated to have been the size of four elephants. When first described in 1991, discoverer David Gillette calculated it to be 33 m long based on isometric scaling with D. carnegii. However, he later stated that this was unlikely and estimated it

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