Species:Barosaurus lentus Pronunciation: Bar-oh-sore-us len-tus Meaning: "Slow heavy lizard" What: Diplodocid dinosaur Where: United States (South Dakota and Utah) When: ~ 152,000,000 B.C.E. to 150,000,000 B.C.E. Size: 25 to 27 meters (82 to 89 feet) long Diet: Herbivore Reconstruction: Barosaurus lentus Fun Fact: The structure of the cervical vertebrae of Barosaurus lentus allowed for a significant degree of lateral flexibility in the neck, but restricted vertical flexibility. This suggests a different feeding style for this species when compared to other diplodocids. Barosaurus swept its neck in long arcs at ground level when feeding, which resembled the strategy that was first proposed by John Martin in 1987. The restriction in vertical flexibility suggests that Barosaurus could not feed on vegetation that was high off the ground.