Bagualosaurus (meaning "bagel lizard") is a sauropodomorph dinosaur. It is the seventh known sauropodomorph discovered in Brazil. It was described in 2018.
Bagualosaurus lived about 223–230 million years ago, and grew to about 2.5 meters (8.2 ft) long.
The holotype specimen had a partial skull and jaw, twelve back vertebrae, two tail vertebrae, two chevrons, a pelvis, two partial hindlimbs and five fragmentary ribs. The pieces were found on a ravine at the edge of a pond in rural Agudo in 2007.
The fossil had been kept in a closet of the Laboratory of Paleovertebrates of the Federal University of Rio Grande do Sul South. The fossil was described as a sauropodomorph on May 25, 2018.