KNM ER 992

KNM ER 992

KNM ER 992 replica
Catalog no.	KNM ER 992
Species	Homo ergaster
Age	1.5 mya
Place discovered	Koobi Fora, Kenya
Date discovered	1975
Discovered by	Richard Leakey

KNM ER 992 is a 1.5 million years old fossilized lower jaw discovered by Richard Leakey in 1971 at Lake Turkana, Kenya. The mandible was considered by C. Groves and V. Mazak to be the holotype specimen for Homo ergaster.