This list of the Mesozoic life of South Dakota contains the various prehistoric life-forms whose
fossilized remains have been reported from
within the US state of
South Dakota and are between 252.17 and 66 million years of age.
Restoration of the Late Jurassic sauropod dinosaur Barosaurus rearing to defend itself against a pair of the theropod Allosaurus †Barosaurus – type locality for genus