---
lang: en
type: Hominin
record_kind: entity-profile
title: Kenyanthropus platyops
description: An early hominin species from the Pliocene of East Africa, notable for its uniquely flat facial structure and its controversial taxonomic placement relative to Australopithecus.
llms_summary: "Kenyanthropus platyops. (Lomekwi, Turkana County, Kenya). Hominin. Associated Tools None (Lomekwian tools found in same region but not directly associated). Chronological Range 3.5 Mya. Cranial Capacity 400 cc. Estimated Stature Unknown (no postcranial fossils) m. Evolutionary Group Australopith. Extinction Context Disappears from the fossil record around 3.2 Mya; reasons unknown but likely involved environmental change and/or competition with other hominins.  Fossil Abundance Extremely rare; one cranium and minor fragments. Type Specimen KNM-WT 40000. Year Discovered 1999. Paleoanthropology. An early hominin species from the Pliocene of East Africa, notable for its uniquely flat facial structure and its controversial taxonomic placement relative to Australopithecus.  canonical profile on Chrisyst Datasets"
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slug: kenyanthropus-platyops
record_kind: entity-profile
content_sha256: b828ba45b12f39228a20b83913310fcb6a5bcd6adab1489e1811d8092dd26c27
indexed_at: "2026-07-16T13:15:13.715Z"
license: citation-free
entities:
  -
    role: subject
    slug: kenyanthropus-platyops
    name: Kenyanthropus platyops
    type: Hominin
    profile_url: "https://datasets.chrisyst.com/kenyanthropus-platyops/index.md"
    same_as:
      - "https://www.wikidata.org/wiki/Q134844"
---
# Kenyanthropus platyops

An early hominin species from the Pliocene of East Africa, notable for its uniquely flat facial structure and its controversial taxonomic placement relative to Australopithecus.

## Record

- **Title**: [Kenyanthropus platyops](https://datasets.chrisyst.com/kenyanthropus-platyops/index.md)
- **Geo target**: Lomekwi, Turkana County, Kenya
- **Website**: https://www.turkanabasin.org/
- **Address**: Turkana Basin Institute, Lodwar, Turkana County, Kenya
- **Coordinates**: 3.5333, 35.8

### Summary

An early hominin species from the Pliocene of East Africa, notable for its uniquely flat facial structure and its controversial taxonomic placement relative to Australopithecus.

### Description

## Kenyanthropus platyops
Discovered in 1999 by a team led by Meave Leakey at Lomekwi, near Lake Turkana in Kenya, *Kenyanthropus platyops* introduced a new level of complexity to the Pliocene hominin fossil record. The species is primarily known from the type specimen, a crushed but relatively complete cranium designated KNM-WT 40000. Its most defining characteristic is a remarkably broad and flat (orthognathic) facial skeleton, combined with small molar teeth. This morphology contrasts sharply with the more projecting (prognathic) faces of its contemporaries, such as *Australopithecus afarensis*. This unique combination of a derived, modern-looking facial structure with a primitive, small cranial capacity challenges linear models of human evolution, suggesting multiple hominin lineages coexisted and experimented with different adaptive strategies.

The name *Kenyanthropus platyops* translates to "flat-faced man from Kenya," underscoring its key anatomical feature. Its existence demonstrates that hominin diversity during the mid-Pliocene was greater than previously understood, supporting a model of a "bushy" evolutionary tree rather than a single, linear progression. The primary debate surrounding this species is its validity as a distinct genus. Some paleoanthropologists argue it represents a separate evolutionary branch, potentially more closely related to the genus *Homo* than the australopiths are. Others contend that the flatness of the KNM-WT 40000 cranium is an artifact of post-mortem distortion and that the specimen should be classified within *Australopithecus*. The lack of associated postcranial remains makes its locomotion and body plan speculative.

### Attributes

- **Associated Tools**: None (Lomekwian tools found in same region but not directly associated)
- **Chronological Range**: 3.5 Mya
- **Cranial Capacity**: 400 cc _(quality 450)_
- **Estimated Stature**: Unknown (no postcranial fossils) m
- **Evolutionary Group**: Australopith
- **Extinction Context**: Disappears from the fossil record around 3.2 Mya; reasons unknown but likely involved environmental change and/or competition with other hominins.
- **Fossil Abundance**: Extremely rare; one cranium and minor fragments
- **Type Specimen**: KNM-WT 40000
- **Year Discovered**: 1999 _(quality 1999)_