A 2015 re-assessment of Laplatasaurus found it to be closely related to Bonitasaura, Futalognkosaurus, Mendozasaurus, and Uberabatitan.
In a 2015 reassessment, Laplatasaurus was found to share close evolutionary ties with Bonitasaura, Futalognkosaurus, Mendozasaurus, and Uberabatitan.