Kingdom Animalia
Phylum Chordata
Superclass Tetrapoda
Class Reptilia
Subclass Diapsida
Superorder Dinosauria
Order Saurischia
Suborder Sauropodomorpha
Superfamily Diplodocoidea
Family Diplodocidae
Subfamily Diplodocinae
Genus Barosaurus
1st Species Barosaurus lentus
Other attributes
Time Range 152-150 mya
Location United States of America
Name Meaning Heavy reptile
Physical Dimensions 25.9 meters long for the largest specimen
Weight 10.9 tonnes for the largest specimen
Dietary Classification Herbivore

Barosaurus is a diplodocid sauropod sauropodomorph dinosaur from the Late Jurassic of the United States of America. It was named in 1890 by Othniel Charles Marsh. It had a very long neck for a sauropod (only being beaten by Mamenchisaurus in terms of neck length); as well as this, it was the largest sauropod, and by extension, the largest dinosaur to walk the Earth.


Barosaurus was a sauropod with a bulky body, 4 large, erect, pillar-like legs (with one large claw on each hand and 3 clawed toes on each foot), an extremely long, whip-like tail, and a small head. Perhaps the most defining trait of Barosaurus was its extremely long neck. Its body would have been covered in scaly skin, with a row of spines running down its back.


Barosaurus was an herbivore, primarily feeding on ferns, cycads, horsetails, and leaves, but also snacking on algae from time to time. Its peg-like teeth were used to strip branches of their leaves, and its long neck would have helped it reach plants further away from its body.


So far, all we know about Barosaurus is that it was able to sweep its extremely long neck across a wide area of vegetation without having to constantly move from one area to another, it used its peg-like teeth to strip branches of their leaves, and in order to breathe properly, it received a steady supply of oxygen through avian air sacs running all the way from its neck to its lungs (like any other dinosaur).

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