Apatosaurus vs. Brontosaurus — What's the Difference?

Apatosaurus (; meaning "deceptive lizard") is a genus of herbivorous sauropod dinosaur that lived in North America during the Late Jurassic period. Othniel Charles Marsh described and named the first-known species, A. ajax, in 1877, and a second species, A. louisae, was discovered and named by William H. Holland in 1916.

Brontosaurus (; meaning "thunder lizard" from Greek βροντή, brontē "thunder" and σαῦρος, sauros "lizard") is a genus of gigantic quadruped sauropod dinosaurs. Although the type species, B. excelsus, had long been considered a species of the closely related Apatosaurus, researchers proposed in 2015 that Brontosaurus is a genus separate from Apatosaurus and that it contains three species: B. excelsus, B. yahnahpin, and B. parvus.Brontosaurus had a long, thin neck and a small head adapted for a herbivorous lifestyle, a bulky, heavy torso, and a long, whip-like tail.

A very large herbivorous sauropod dinosaur of the genus Apatosaurus of the Jurassic Period, having a long neck and tail and a small head.

An apatosaurus.

A large sauropod dinosaur of the genus Apatosaurus of the late Jurassic Period. Apatosaurs had a long neck and tail and a relatively small head.

One of the largest land animals to ever walk the earth; a Brontosaurus.

A genus of extinct dinosaurs comprising the brontosaurs; apatosaurs.

A genus of large sauropod American dinosaurs of the jurassic era, or an individual of that genus. A length of sixty feet is believed to have been attained by these reptiles. The genus is also called Apatosaurus, and individuals of the genus are also called brontosaurs.

Huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic

Huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic