Pellegrinisaurus (meaning Lizard from Pelligrini) is a genus of titanosaurian sauropod dinosaur that lived in South America during the Late Cretaceous period.

[1] The assigned holotype, MPCA 1500, was discovered in 1975 by Roberto Abel and his assistant Jaime Emilio Powell.

Autapomorphic features of Pellegrinisaurus, by which it can be distinguished, are:[1] Pellegrinisaurus differs from other titanosaurs by having anteroposteriorly elongate and dorsoventrally depressed mid-posterior and posterior caudal spines; Salgado interpreted this condition as an extra-articulation between the neural spine and the articular process of the subsequent vertebra, that reduced tail movement.

[1] Pellegrinisaurus was unearthed from the Allen Formation, in which it probably lived alongside other titanosaurs, such as Aeolosaurus and Rocasaurus.

[1] Malawisaurus Diamantinasaurus Tapuiasaurus Rapetosaurus Isisaurus Nullotitan Saltasauridae Baurutitan Pellegrinisaurus Alamosaurus Trigonosaurus