σαυρος, sauros "lizard") is a genus of diplodocoid sauropod dinosaur that lived in what is now Lindi Region, Tanzania during the late Jurassic period.

Unlike most diplodocoids, Dicraeosaurus had a comparatively large head with a relatively short and wide neck.

The neck contained 12 unusually short vertebrae, likely indicating a low-level browser of vegetation no more than 3 metres (9.8 ft) off the ground.

[2] The genus is notable for the rather tall neural spines protruding from its vertebrae, which it is named for.

[3] Dicraeosaurus was a mid-sized herbivore for its ecosystem, found in the Tendaguru Formation of Tanzania, which dates to the Late Jurassic.