Barosaurus

Six diplodocoids (top to bottom): Barosaurus, Apatosaurus louisae, Brachytrachelopan, Nigersaurus, Haplocanthosaurus, Amargasaurus

Six diplodocoids (top to bottom): Barosaurus, Apatosaurus louisae, Brachytrachelopan, Nigersaurus, Haplocanthosaurus, Amargasaurus

Six diplodocoids (top to bottom): Barosaurus, Apatosaurus louisae, Brachytrachelopan, Nigersaurus, Haplocanthosaurus, Amargasaurus

Six examplar sauropods (top to bottom): Patagotitan at the Field Museum of Natural History, Barosaurus at the American Museum of Natural History, Giraffatitan at the Museum fur Naturkunde, Omeisaurus tianfuensis at the Zigong Dinosaur Museum, Shunosaurus, and Amargasaurus

Six examplar sauropods (top to bottom): Patagotitan at the Field Museum of Natural History, Barosaurus at the American Museum of Natural History, Giraffatitan at the Museum fur Naturkunde, Omeisaurus tianfuensis at the Zigong Dinosaur Museum, Shunosaurus, and Amargasaurus

The official postcard (of the American Museum of Natural History) says this is a Barosaurus, and that "this unique freestanding mount is the only Barosaurus on view in the world". This was true until the installation of another Barosaurus specimen at the Royal Ontario Museum. The adult specimen pictured is AMNH 6341, classified as Barosaurus lentus. The juvenile specimen (AMNH 7530), originally classified as a juvenile Barosaurus, has since been reclassified as a specimen of Kaatedocus siberi.