Diplodocus had the longest whip-like tail ever.
The second longest dinosaur is Argentinosaurus, at 140 ft long.
its a dinosaur it is the dinosaur with the longest name ever
AMPHICOELIAS
The longest dinosaur is believed to be Argentinasaurus, which could grow to 110 feet.
The dinosaur that lived the longest was the Brachiosaurus, which lived around 150 million years ago during the Jurassic period.
Liopleurodon
The tallest dinosaur ever discovered is a Sauroposeidon.However, this is not the longest or most massive dinosaur.
The longest dinosaur lenth is about 50 feet (15 meters) according to scientiests.
It was not a dinosaur, but a plesiosaur and the longest plesiosaur. It could grow upto 15 m long.
mamenchasaurus
The name of a long-tailed herbivorous bipedal dinosaur is a Hadrosaur, also known as duck-billed dinosaurs. They were characterized by their beak-like mouths and rows of teeth, and they lived during the Late Cretaceous period.
The argentinosauraus is the biggest and longest.