Pilmatueia faundezi

Pilmatueia is a genus of diplodocoid sauropods belonging to the family Dicraeosauridae that lived during the Early Cretaceous in what is now Argentina. Its type and only species is Pilmatueia faundezi. Pilmatueia was probably closely related to other South American dicraeosaurids such as Amargasaurus. Like other dicraeosaurids, Pilmatueia was relatively small for a sauropod. The vertebrae of Pilmatueia were more extensively hollowed out by air sacs than in other dicraeosaurids, which otherwise were characterized by a reduction in the air sac system compared to other sauropods. Pilmatueia dates to the Valanginian, an age of the Cretaceous period for which dinosaur faunas are poorly known.