Cathetosaurus Facts
| Diet | Herbivore |
| Height | 4m |
| Length | 18m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | United States |

| Diet | Herbivore |
| Height | 4m |
| Length | 18m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | United States |
Cathetosaurus was a massive sauropod dinosaur that roamed the western United States during the Late Jurassic period, approximately 161 to 149 million years ago. Originally described as its own genus by James A. Jensen in 1988, this enormous herbivore is now considered by most researchers to be a species of the well-known Camarasaurus, though some recent studies suggest it may deserve its own genus after all.
This impressive sauropod measured around 18 metres in length and stood approximately 4 metres tall at the hip, with an estimated weight of 15 tonnes. Like other sauropods, Cathetosaurus possessed the characteristic long neck and tail, massive body, and pillar-like legs that supported its enormous bulk. Its long neck allowed it to reach vegetation high in the treetops that other dinosaurs couldn't access.
As a herbivore, Cathetosaurus fed on conifers, ferns, and cycads that grew in the warm, humid climate of the Late Jurassic. It used its peg-like teeth to strip leaves and soft shoots from branches, swallowing them whole to be processed in its enormous gut. The dinosaur likely travelled in herds across the floodplains and forests of what is now the western United States.
The taxonomic status of Cathetosaurus remains a subject of scientific debate, highlighting how our understanding of dinosaur relationships continues to evolve as new evidence emerges. Whether considered a distinct genus or a species of Camarasaurus, this sauropod represents an important piece of the puzzle in understanding Late Jurassic ecosystems.
Cathetosaurus possessed the typical sauropod features of an extremely long neck and tail, massive barrel-shaped body, and four pillar-like legs. As a member of the Camarasauridae family, it likely had a relatively shorter neck compared to other sauropods and a more robust skull with spatulate teeth.
Cathetosaurus likely lived in herds and migrated across the Late Jurassic landscape in search of fresh vegetation. Like other sauropods, it probably used its long neck to browse at different heights, from ground level to the forest canopy, maximising feeding opportunities.
Cathetosaurus was first described by James A. Jensen in 1988. The original fossils were discovered at Upper Jurassic formations, United States.