| Diet | Herbivore |
| Height | 5m |
| Length | 20m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Sauropod |
| Location | Argentina |
Kaijutitan was a massive sauropod dinosaur that lived approximately 89.8 million years ago during the Late Cretaceous period in what is now Argentina. This enormous herbivore belonged to the titanosaur group, which were among the largest land animals that ever existed. Kaijutitan represents one of the earlier members of this impressive lineage.
Like other sauropods, Kaijutitan possessed the characteristic long neck and tail, massive body, and four pillar-like legs that supported its enormous weight. Its long neck would have allowed it to reach high into the canopy to browse on conifers, ferns, and other vegetation that dominated the Cretaceous landscape. The discovery of Kaijutitan has provided paleontologists with valuable insights into the early evolution of titanosaurs in South America.
Fossils of Kaijutitan were discovered in the Sierra Barrosa Formation in Argentina's Neuquén Province, a region famous for its exceptional dinosaur discoveries. The species name 'maui' honours the Polynesian demigod Maui, reflecting the creature's legendary size and strength. As a basal titanosaur, Kaijutitan helps scientists understand how these giants evolved and diversified during the Cretaceous period.
Living in the warm, humid climate of Cretaceous Argentina, Kaijutitan would have shared its environment with various other dinosaurs, including fearsome predators and fellow plant-eaters. Its sheer size would have been its primary defence against carnivorous dinosaurs of the time.
Kaijutitan possessed the typical titanosaur body plan with a very long neck, relatively small head, and massive body supported by four column-like legs. As a basal member of the titanosaur group, it likely retained some primitive features that distinguished it from later, more derived titanosaurs.
Kaijutitan would have spent most of its time feeding, using its long neck to reach vegetation at various heights. Like other sauropods, it likely travelled in herds for protection, with adults possibly protecting younger individuals from predators through their massive size and potentially defensive tail-swinging behaviour.
Kaijutitan was first described by Pablo Gallina and colleagues in 2019. The original fossils were discovered at Sierra Barrosa Formation, Neuquén Province, Argentina.
