Graecopithecus is a questionable fossil ape from the Late Miocene, dated to about 7.2 million years back.

Some scientists have actually proposed that it might represent the earliest hominin– perhaps even older than fossils generally connected to early hominins in Africa.

Previously, Graecopithecus has actually been understood from simply 2 fossils: a partial lower jaw with teeth, found in 1944 near Athens, Greece; and a separated upper premolar from Azmaka, Bulgaria, explained in the 2010s.

“At 7.2 million years of ages, this forefather, which we categorize as coming from the genus Graecopithecusmight be the earliest recognized human,” stated University of Toronto’s Professor David Begun, co-author of the brand-new research study.

In the research study, the scientists took a look at an almost total thigh (thigh bone) of Graecopithecus from the Azmaka website.

The brand-new fossil was discovered in 2016 in floodplain deposits dated to about 7.2 million years back.

The Azmaka bone has a round femoral head plainly triggered from the neck and an extended, obliquely rising median margin of the neck– a setup attribute of hominoids.

The specimen does not reveal the complete suite of expertises seen in later bipeds.

The neck-shaft angle falls within the lower variety of contemporary human beings and near quotes for early hominins such as Orrorinhowever listed below the greater angles normal of suspensory apes like orangutans.

According to group, the mix of characteristics indicate a transitional type of bipedalism: neither a specialized suspensory climber nor a completely devoted terrestrial biped.

Body mass approximates originated from femoral head and shaft measurements recommend a Graecopithecus private weighing approximately 23 to 24 kg, similar to a little chimpanzee.

“A variety of external and internal morphological functions, such as the lengthened, upward-pointing neck in between the thigh shaft and head, unique accessory points for the gluteal muscles, and the density of the external bone layer, have resemblances with bipedal fossil human forefathers and people,” stated Professor Nikolai Spassov, a scientist at the Bulgarian National Museum of Natural History.

“This is where they varied from the thighs of tree-dwelling apes.”

“However, Graecopithecus did not rather move the method modern-day human beings do.”

The Azmaka environment, rebuilded as bush and forest savanna near a braided river system, recommends that early terrestrial bipedalism might have emerged outside thick forests.

The authors assume that descendants of this population might have distributed from Eurasia into Africa in the middle of weather and ecological shifts in the eastern Mediterranean throughout the Late Miocene, possibly adding to the origins of later African apes and hominins.

Whether the Azmaka thigh eventually improves the geographical story of human origins will depend upon more discoveries.

For now, it supplies an unusual peek of how and where upright walking might have very first taken hold– in a landscape of seasonal rivers and open forest, millions of years before the earliest extensively accepted members of the human family tree appeared in Africa.

Graecopithecus represents a phase in human development in between our arboreal and ground-dwelling forefathers, such as the practically 12-million-year-old Danuvius guggenmosi from the Hammerschmiede website in southern Germany, and more current discovers from East Africa,” Professor Begun stated.

“One might definitely explain it as a missing out on link. Graecopithecus more than likely came down from the 8- to nine-million-year-old Balkan-Anatolian apes like Ouranopithecus and Anadoluviuswhich in turn progressed from forefathers in western and main Europe.”

“We understand that massive environment modifications in the eastern Mediterranean and western Asia resulted in the regular development of substantial semi-deserts and deserts 8 to 6 million years earlier.”

“This triggered numerous waves of dispersal of Eurasian mammals to Africa and laid the structure for today’s mammal animals of African savannas,” Professor Böhme concluded.

The group’s outcomes were released in November 2025 in the journal Palaeobiodiversity and Palaeoenvironments

_____

N. Spassov et alAn early kind of terrestrial hominine bipedalism in the Late Miocene of Bulgaria. Palaeobio Palaeoenvreleased online November 13, 2025; doi: 10.1007/ s12549-025-00691-0