Australopithecus anamensis

Dublin Core


Australopithecus anamensis

Fossil Item Type Metadata

Type Specimen

KNM - KP 29281

Location (Country)


Site (Name)

47 specimens found at Kanapoi
31 specimens found at Allia Bay

Discovery Date

The first Au. anamensis specimen, a left distal humerus, was found in 1965 by Bryan Patterson.

Meave Leakey's party discovered the Au. anamensis type specimen in 1994.

Specimen/Species Time Range

Patterson's specimen - between 3.5 - 4.1 million years. Leakey's specimens h- ~ 4.2 million years.
Additional specimens from Allia Bay - ca. 3.9,million years.

Therefore, the time range given to this species is from 4.2 - 3.8 million years ago.

Dating Method

The Kanapoi site is comprised of two layers; an upper layer and a lower layer. Ar/Ar dating was used to date the layers, therefore providing an accurate date for fossils found at this site.

Ar/Ar dating was also used to date the layers at the Allia Bay site.

Specimen Data (Morphology)

Adult mandible
Date Added
March 21, 2017
Item Type
“Australopithecus anamensis,” Hominid Fossil Repository, accessed May 21, 2022,