Opisthocoelicaudiinae is a subfamily of titanosaurian dinosaurs from the Late Cretaceous.

[4] The hands of opisthocoelicaudiines lacked wrist bones and phalanges.

[6] It was suggested by Averianov and Lopatin in 2022 that Opisthocoelicaudia was not in fact closely related to Saltasaurus, and instead to Nemegtosaurus and Quaesitosaurus, which are both also Laurasian, as well as isolated teeth from the Turonian of Uzbekistan and the Santonian of Kazakhstan.

Suggesting a more distant relationship to Saltasaurus, Averianiov and Lopatin suggested using the clade name Opisthocoelicaudiidae for the group, limiting Saltasauridae to Gondwanan taxa.

[3] Opisthocoelicaudiinae in a cladogram after Navarro et al., 2022:[7] Opisthocoelicaudia Nemegtosaurus Alamosaurus Baurutitan Ibirania Bonatitan Rocasaurus Neuquensaurus