Mamenchisaurus, a 150-million-year-old plant-eater from China, had a new neck length estimate.
Whip-like tails, long necks, and pillar-like arms supported these massive dinosaurs.
In the late Jurassic era, Mamenchisaurus roamed China, giving other sauropods neck envy.
Wednesday's Journal of Systematic Paleontology reported Mamenchisaurus's neck was nearly 50 feet long.
Longer than the average school bus, its neck is the longest estimated of any sauropod species
It may be the longest neck on an animal ever observed.
The dinosaur was named Mamenchisaurus sinocanadorum and linked to several East Asian long-necked sauropods.
Stony Brook University sauropod expert Andrew Moore says many large dinosaurs were like this.
At nearly 44 feet long, it represents the longest complete neck in the fossil record.