Allosaurus VS Barosaurus with baby in the AMNH.
This scene have been recreated and illustrated many times, like this one from John Gurche.
Photos by me.

Un Allosaurus contra un Barosaurus y su cría en el AMNH.
Esta escena ha sido recreada e ilustrada muchas veces, como la de acá por John Gurche.
Fotos mías.


I found one of the many books on dinosaurs I read all the time as a young kid, and came across a lot of Luis Rey paintings. I really love Rey’s artwork, and since I can’t seem to find any of these online I decided to put them up here for all you lovely people to enjoy.

“Heavy lizard”
Late Jurassic, 152-150 million years ago

Although its neck was longer and its tail was shorter, Barosaurus was roughly the same size as its close relative Diplodocus. It was dubbed “Heavy lizard” because at 85 feet long and 20 tons, this powerful plant-eater still couldn’t escape reductive ideals of beauty.

…Apatosaurus was heavier.

Barosaurus lentus


Name: Barosaurus lentus

Name Meaning: Heavy Reptile

First Described: 1890

Described By: Marsh

ClassificationDinosauria, Saurischia, Eusaurischia, Sauropodomorpha,Plateosauria, Massopoda, Sauropodiformes, Anchisauria, Sauropoda,Gravisauria, Eusauropoda, Neosauropoda, Diplodocoidea, Diplodocimorpha, Flagellicaudata, Diplodocidae, Diplodocinae

Barosaurus has always been one of my favorite diplodocids, and I think it’s just because of the sheer and impressive length of this animal, with a longer neck and shorter tail than its close relative Diplodocus (though still amazingly long). It could grow up to 27.5 meters long, and most of that was truly neck and tail. Like other members of the Diplodocine family (as opposed to the Apatosaurine) family, it had a slender build and longer neck than the typical Apatosaurus or Brontosaurus. It is known from the Morrison Formation of Utah and South Dakota, though for a time it was thought to also live in Africa. However, this specimen has been reassigned to the genus Tornieria, though it is not unreasonable to suppose the two were closely related, given their similar features. It lived between 152 and 150 million years ago, in the Tithonian age of the Late Jurassic. 


Barosaurus had good lateral flexibility in its neck, but reduced vertical flexibility, indicating that it had a different feeding style than other diplodocids. It could sweep its neck in long arcs at ground level when feeding, and probably wouldn’t have fed on high-level vegetation. Its neck was about 10 meters long, giving it a wide range of motion, and may have even helped in radiating excess body heat. It’s also possible these long necks were a result of sexual selection. However, we still do not have a Barosaurus skull, though it would be reasonable to suppose that it would be similar to that of Diplodocus. Being from the Morrison formation, it lived alongside many other dinosaurs, such as Camarasaurus, Diplodocus, Apatosaurus, Brontosaurus< Brachiosaurus, Camptosaurus, Dryosaurus, Stegosaurus, Othnielosaurus, Saurophaganax, Torvosaurus, Ceratosaurus, Marshosaurus, Stokesosaurus, Ornitholestes, and Allosaurus. It lived in very high atmospheric concentrations of carbon dioxide, and very warm temperatures of 20 degrees Celsius in winter and 40-45 degrees Celsius in summer, leading to a semi-arid climate and seasonal rainfall. Definitely… not an environment I could have survived in. 


Shout out goes to fluffyvelociraptor!

The heavy lizard, Barosaurus (1890)

Phylum : Chordata
Class : Reptilia
Order : Saurischia
Suborder : Sauropodomorpha
Family : Diplodocidae
Subfamily : Diplodocinae
Genus : Barosaurus
Species : B. lentus

  • Late Jurassic (157,3 - 145 Ma)
  • 26 m long and 20 000 kg (size)
  • Morrison formation, United States (map)

A close relative of Diplodocus, Barosaurus is virtually indistinguishable from its harder-to-pronounce cousin, save for its 30-foot-long neck (one of the longest of any dinosaur, save Mamenchisaurus). Like other sauropods of the late Jurassic period, Barosaurus wasn’t the brainiest dinosaur that ever lived–its head was unusually small for its massive body–and it probably spent its entire life foraging the tops of trees, protected from predators by its sheer bulk.

The sheer length of Barosaurus’ neck raises some interesting questions. If this dinosaur reared up to its full height, it would have been as tall as a five-story building–which would have placed enormous demands on its heart and overall physiology. Evolutionary biologists have calculated that the ticker of a such a long-necked sauropod would have had to weigh a whopping 1.5 tons, which has prompted speculation about alternate body plans (say, additional, “subsidiary” hearts lining this dinosaur’s neck, or a posture in which Barosaurus held its neck parallel to the ground, like the hose of a vacuum cleaner).

The structure of the cervical vertebrae of Barosaurus allowed for a significant degree of lateral flexibility in the neck, but restricted vertical flexibility. This suggests a different feeding style for this genus when compared to other diplodocids. Barosaurus swept its neck in long arcs at ground level when feeding, which resembled the strategy that was first proposed by John Martin in 1987. The restriction in vertical flexibility suggests that Barosaurus could not feed on vegetation that was high off the ground.