First Paranthropus Mandible from Afar, Ethiopia, at 2.6 Million Years Old Extends Genus Range Thousands of Kilometers Northward

A groundbreaking Nature paper published in late 2025 has delivered the northernmost and oldest confirmed Paranthropus fossil ever found: a remarkably complete lower jaw from Ethiopia’s Ledi-Geraru site in the Afar region, dated precisely to 2.6 million years ago.

Led by Brian Villmoare and Yohannes Haile-Selᴀssie, the international team recovered the mandible (LD 760-1) from the same sedimentary package that previously yielded the oldest Homo jaw (LD 350-1). The specimen displays the classic “nutcracker” morphology of Paranthropus—mᴀssive, thick-enameled molars, robust corpus, and a deep mandibular body—yet it is stratigraphically older than any known P. aethiopicus or P. boisei from southern Ethiopia or Kenya.

High-precision 40Ar/39Ar dating of interbedded tuffs places the fossil at 2.60 ± 0.02 Ma, pushing the genus’s documented range more than 1,000 km northward from its previous northernmost limit near the Omo-Turkana Basin. The find demonstrates that Paranthropus was already established in the Afar by 2.6 Ma, coexisting with early Homo and the newly identified Australopithecus species from the same site.

“This mandible rewrites the biogeography of the genus,” Villmoare stated. “Paranthropus was not a southern or rift-valley specialist—it thrived across a much wider swath of eastern Africa than we ever realized.”

The discovery fills a critical gap between the earliest Homo and the later robust australopiths, confirming that multiple hominin lineages overlapped in the Afar during the critical 2.6–2.5 Ma window when stone tools and larger brains first appear. It also supports models of rapid dispersal and ecological flexibility among early Paranthropus populations.

After decades of searching, the Afar has finally yielded its first Paranthropus—a single jaw that extends the genus’s known world by thousands of kilometers and proves these “nutcracker” hominins were far more widespread, and far earlier, than textbooks once allowed.