They were generally interpreted as belonging to "Barosaurus". The subfamily also included "Diplodocus", "Barosaurus" and "Apatosaurus". Among these were "Apatosaurus", "Barosaurus", "Camarasaurus", "Diplodocus", "Haplocanthosaurus", and "Supersaurus". The limb bones of "Barosaurus" were virtually indistinguishable from those of "Diplodocus". It shared elongated neck vertebrae and a rather long forelimb with "Barosaurus". Sauropod skulls are rarely preserved, and scientists have yet to discover a "Barosaurus" skull. The two Morrison Formation sauropod genera "Diplodocus" and "Barosaurus" had very similar limb bones. With its elongated neck vertebrae, "Tornieria" may have been particularly closely related to "Barosaurus".