Opisthocoelicaudiinae
Opisthocoelicaudiinae is a clade of titanosaurian dinosaurs from the Late Cretaceous, ranked as a subfamily. It was named by John McIntosh in 1990. Opisthocoelicaudiines are known from China, Mongolia, and the United States. Three genera were assigned to Opisthocoelicaudiinae by Gonzalez et al. : Alamosaurus, Opisthocoelicaudia and Pellegrinisaurus, although only Alamosaurus and Opisthocoelicaudia were found within the group by Díez Díaz et al.. The hands of opisthocoelicaudiines lacked wrist bones and phalanges.
