Juvenile titanosaurian (Dinosauria: Sauropoda) remains from the Upper Cretaceous of Barreales Lake, Neuquén, Argentina

Abstract

Remains of juvenile sauropods from the Upper Cretaceous Portezuelo Formation (Neuquén Group), at Barreales Lake (Neuquén Province), are identified and described. The material include a femur (14.6 cm length) and an anterior caudal vertebra (3.1 cm length). Their general morphology allows us to assign these bones to the Titanosauria. Although a specific assignation is impossible, in view of the fragmentary condition of the material, these bones are important because they expand our knowledge on the immature stages of titanosaurs.