Apatosaurus
Scientific classification
Kingdom Information
Kingdom	Animalia
Phylum Information
Phylum	Chordata
Class Information
Class	Sauropsida
Order Information
Superorder	Dinosauria
Order	Saurischia
Sub-order	Sauropodomorpha
Infraorder	Sauropoda
Family Information
Family	Diplodocidae
Genus Information
Genus	Apatosaurus
Species Information
Species	A. ajax A. excelsus A. louisae
Synonyms	Brontosaurus
Population statistics
Conservation status	Extinct

Apatosaurus (Greek: ἀπατηλός apatelos, and σαῦρος sauros; "deceptive lizard") refers to three species of dinosaur originally discovered in the 1870s in the western United States. In 1903, a similar dinosaur named Brontosaurus was thought to have been the same species as Apatosaurus and was thus called Apatosaurus for over a century. Recent studies show, however, that both were actually separate species all along; Apatosaurus had a lower and wider neck than Brontosaurus.^[1]

1. ↑ https://www.scientificamerican.com/article/the-brontosaurus-is-back1/