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The Bactrian camel shares the genus "Camelus" with the dromedary ("C. dromedarius") and the wild Bactrian camel ("C. ferus"). The Bactrian camel belongs to the family Camelidae. The ancient Greek philosopher Aristotle was the first to describe the species of "Camelus": in his 4th-century-BC "History of Animals" he identified the one-humped Arabian camel and the two-humped Bactrian camel. The Bactrian camel was given its current binomial name "Camelus bactrianus" by Swedish zoologist Carl Linnaeus in his 1758 publication "Systema Naturae".