Rukwatitan

Rukwatitan's name includes 'bisepultus', which means 'twice buried' because part of its skeleton was first buried in mud, then washed away and reburied by a river.1

It lived about 100 million years ago, during the middle Cretaceous period.2

Its upper arm bone (humerus) had a square cross-section, which is unusual for sauropods.1

Rukwatitan shared its home with a crocodile-like reptile called Rukwasuchus, whose fossils were found at the same site.1

It was a basal (early) titanosaur, meaning it belonged to the group that later included the largest dinosaurs ever.1

The neck vertebrae of Rukwatitan had undivided air pockets (pleurocoels), which helped lighten its skeleton.1

Rukwatitan was about 9 meters (30 feet) long, roughly the length of a school bus.2