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tend to be around 35 - 44 MT in body mass. A potential second species, S. lourinhanensis (Dinheirosaurus), is known from Portugal and has been dated to a similar time.

Discovery

Supersaurus is present in stratigraphic zone 5 of the Morrison, dating from the Tithonian. The original fossil remains of Supersaurus were discovered in the Dry Mesa Quarry in

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