Sibirotitan Facts
| Diet | Herbivore |
| Height | 4m |
| Length | 15m |
| Weight | 12 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Sauropod |
| Location | Russia |

| Diet | Herbivore |
| Height | 4m |
| Length | 15m |
| Weight | 12 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Sauropod |
| Location | Russia |
Sibirotitan was a massive sauropod dinosaur that thundered across the ancient landscapes of what is now Siberia during the Early Cretaceous period, approximately 125 to 121 million years ago. This colossal herbivore belonged to a specialised group of sauropods called somphospondyls, which were characterised by their particularly robust vertebrae and advanced skeletal features.
Like other sauropods, Sibirotitan possessed the classic long-necked, long-tailed body plan that made these dinosaurs so successful. It would have stood roughly 4 metres tall at the hips and stretched about 15 metres from nose to tail, weighing an estimated 12 tonnes. Its powerful legs supported its massive frame as it wandered through the coniferous forests and fern-filled clearings of Early Cretaceous Siberia.
As a herbivore, Sibirotitan used its lengthy neck to reach vegetation at various heights, from ground-level ferns to the crowns of tall conifers. Its teeth were adapted for stripping leaves rather than chewing, so it would have swallowed plant material whole and relied on gastroliths (stomach stones) to help grind up tough plant fibres in its enormous digestive system.
The discovery of Sibirotitan has provided valuable insights into sauropod diversity in Asia during the Early Cretaceous, showing that these giants were thriving even in the northern regions that would have experienced seasonal temperature variations quite different from the tropical climates often associated with dinosaur habitats.
Sibirotitan possessed distinctively robust vertebrae with complex internal structures typical of somphospondyl sauropods. Its sacral vertebrae (backbone segments above the hips) showed particularly advanced features that gave the species its name 'astrosacralis', meaning 'star-like sacrum'.
Sibirotitan likely lived in herds, moving slowly through the landscape whilst constantly feeding on available vegetation. Like other large sauropods, it would have needed to consume hundreds of kilograms of plant material daily to sustain its massive body.
Sibirotitan was first described by Alexander Averianov and colleagues in 2017. The original fossils were discovered at Ilek Formation, Kemerovo Oblast, Russia.