Gigantosaurus Facts
| Diet | Herbivore |
| Height | 4m |
| Length | 20m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | England |

| Diet | Herbivore |
| Height | 4m |
| Length | 20m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | England |
Gigantosaurus was a massive sauropod dinosaur that roamed the landscapes of what is now England during the Late Jurassic period, approximately 158 to 149 million years ago. Despite its imposing name meaning 'giant lizard', this prehistoric creature remains one of palaeontology's most mysterious giants, known only from fragmentary fossil remains discovered in the famous Kimmeridge Clay Formation.
As a sauropod, Gigantosaurus would have possessed the characteristic long neck and tail, small head, and enormous body typical of these plant-eating dinosaurs. Scientists estimate it reached lengths of around 20 metres and stood approximately 4 metres tall at the hip, with a massive weight of about 15 tonnes. Like other sauropods, it moved on four sturdy, pillar-like legs that supported its tremendous bulk.
This gentle giant was a herbivore, using its lengthy neck to reach vegetation at various heights, from ground-level ferns to the tops of coniferous trees. Its small head housed simple, peg-like teeth designed for stripping leaves rather than chewing, meaning it likely swallowed stones to help grind plant material in its stomach.
Unfortunately, the limited fossil evidence makes Gigantosaurus a 'nomen dubium' in scientific terms, meaning its exact identity and relationships to other dinosaurs remain uncertain. The fragmentary nature of its remains continues to puzzle palaeontologists, though it provides a fascinating glimpse into Britain's rich dinosaur heritage.
Due to the fragmentary nature of its fossil remains, specific distinguishing features of Gigantosaurus cannot be determined with certainty. The available limb bones suggest it was a large sauropod with robust leg bones capable of supporting enormous weight.
Like other sauropods, Gigantosaurus likely lived in herds for protection against predators and spent most of its time feeding on vegetation. Its long neck would have allowed it to browse efficiently across wide areas without moving its massive body frequently.
Gigantosaurus was first described by Harry Govier Seeley in 1869. The original fossils were discovered at Kimmeridge Clay Formation, England.