Date:

Foot fossil of juvenile hominin exhibits ape-like features

A rare juvenile foot fossil of our early hominin ancestor, Australopithecus afarensis, exhibits several ape-like foot characteristics that could have aided in foot grasping for climbing trees, a new study shows.

This finding challenges the long-held assumption that A. afarensis was exclusively bipedal (using only two legs for walking) and only occasionally climbed into trees. Juvenile hominin fossils provide unique insights into how traits (like foot grasping) become less apparent as the individual grows into adulthood.

- Advertisement -

However, juvenile specimens of most human hominin ancestors are scarce, and thus, it has been difficult to trace how important traits are selected in animals, over time. In 2002, archaeologists discovered a well-preserved, partial skeleton of an infant A. afarensis, thought to be around 3-years-old at the time of death.

Although this 3.32-million-year-old fossil from Dikika, Ethiopia, was announced in a previous 2006 study, many of the skeleton’s elements, including the partial foot known as DIK-1-1f, were encased in sediment and therefore had to be carefully uncovered.

Many of these structures have now been exposed after additional preparatory work through 2013, and here, Jeremy M. DeSilva and colleagues report on this juvenile hominin’s foot features.

They discovered that this infant possessed many of the structures necessary to walk on two legs that have been found in adult specimens, but it also retained a convexity of the medial cuneiform – a bone important for joint movement, such as that involved in climbing – into adulthood, they say.

- Advertisement -

This evidence of increased mobility of the toe is an ape-like pattern that DeSilva et al. say is suggestive of a selective advantage of this trait and which offers new insights into the evolution of bipedality.

Header Image – The Dikika foot is one part of a partial skeleton of a 3.32 million-year-old skeleton of an Australopithecus afarensis child. – Credit: Zeray Alemseged

- Advertisement -

Stay Updated: Follow us on iOS, Android, Google News, Facebook, Instagram, Twitter, Threads, TikTok, LinkedIn, and our newsletter

spot_img
Mark Milligan
Mark Milligan
Mark Milligan is a multi-award-winning journalist and the Managing Editor at HeritageDaily. His background is in archaeology and computer science, having written over 8,000 articles across several online publications. Mark is a member of the Association of British Science Writers (ABSW), the World Federation of Science Journalists, and in 2023 was the recipient of the British Citizen Award for Education, the BCA Medal of Honour, and the UK Prime Minister's Points of Light Award.
spot_img
spot_img

Mobile Application

spot_img

Related Articles

Hidden Medieval tower unearthed in Lublin reveals forgotten chapter of city’s past

Archaeologists have uncovered the remains of a previously undocumented medieval tower within the grounds of the former Pobernardine monastery complex, near the Church of the Conversion of Saint Paul on Bernardyńska Street.

Sinkhole reveals lost remains of medieval hospital

A sinkhole that formed outside the York Theatre Royal has led to the discovery of what could be one of England’s largest medieval hospitals.

Chalcolithic cultural treasures unearthed in Caucasus

Archaeologists from the Institute of Archaeology of the Russian Academy of Sciences have uncovered 13 Chalcolithic-era sites, each yielding a wealth of cultural artefacts and material evidence.

Study reveals East Asia’s earliest gold-inlaid spear sheath

In 1954, a bronze spear sheath dating from Japan’s Kofun period (AD 300–538) was found beneath a rock on Okinoshima, a sacred island located off the coast of Munakata, Fukuoka.

Cache of military helmets from both World Wars discovered during roadworks

Road construction works in the Polish city of Wroclaw have unearthed an unusual cache of military objects from WWI and WWII.

Ten Roman wonders of Britain

Discover the Roman Empire’s extraordinary legacy left on Britain through this selection of ten Roman wonders.

New archaeological treasures unearthed at Finziade

Archaeologists excavating at Finziade in southern Italy have unearthed an artisan workshop and a domestic sacellum containing archaeological treasures.

Significant multi-period discoveries in Delbrück-Bentfeld

An archaeological excavation in Delbrück-Bentfeld, a town in the east of North Rhine-Westphalia, Germany, has unearthed nearly 400 features of archaeological interest that span several centuries.