Fossilized Teeth Might Belong to a Newly Discovered Species of Early Hominins

Sure! Here’s the revised content while keeping all the HTML tags intact:

Model of Australopithecus Hominin

Credit: Cro Magnon/Alamy

In Ethiopia, 13 human teeth have been found within volcanic ash layers dating between 26 to 2.8 million years ago. Researchers indicate that some of these teeth are attributed to the genus Homo, hinting that others may belong to a newly identified human lineage, suggesting a coexistence of both species.

“They shared resources and everything was fine,” says Kay Reed from Arizona State University. “I cannot be certain at this point.”

Previous finds suggested that early members of several Homo species existed in this region about 3 million years ago, including Australopithecus afarensis, the species of the well-known Lucy Fossil.

The emergence of the first representatives of the genus Homo around 2.5 million years ago showcases characteristics increasingly reminiscent of modern human traits. So, what unfolded during that period? To delve into this, Reid and her colleagues have been excavating at Ledi-Geraru, an area rich with volcanic deposits from this pivotal epoch.

In 2013, her team unearthed a chin from a 2.8 million-year-old Homo species, pushing back the timeline for the origin of this genus. Recently, her team identified 13 teeth across three distinct layers of ash.

The oldest and youngest dental specimens (dated 2.79 and 2.59 million years) also belong to the genus Homo, as per the team’s findings. Nevertheless, they postulate that the teeth from the middle layer (dated 2.63 million years) are from Australopithecus. All excavation sites are within a kilometer of one another.

“We anticipated discovering more Homo specimens, yet we also encountered Australopithecus,” Reid remarks.

Molar teeth from Ledi-Geraru, possibly from an unidentified Australopithecus species

Brian Billmore: University of Nevada Las Vegas

Moreover, Australopithecus teeth exhibit distinctive features when compared to A. afarensis and other members of the genus, leading the team to speculate that they may belong to a new species. If this hypothesis holds, it indicates a more intricate and expansive evolutionary tree leading to modern humans than previously assumed.

“This is a significant finding,” states John Hawks from the University of Wisconsin-Madison. However, he cautions against drawing firm conclusions based merely on a handful of teeth.

“When fossils span a timeframe of 200,000 years, as these teeth do, it’s challenging to assert that they coexisted,” remarks Hawks. “That’s a vast period.”

There are also concerns about the identification of distinct species from these teeth. “Many fossils exhibit characteristics that overlap with various species. It’s feasible to categorize smaller samples into distinct groups—some resembling Homo and others more akin to Australopithecus,” Hawks explains.

“The issue remains statistical; the measurements do not indicate that these teeth are substantially different. They fall within the overlapping size ranges of early Australopithecus and early Homo species.”

Neanderthals, Ancient Humans, Cave Art: France

Join New Scientist’s Kate Douglas for an enchanting journey through time, exploring significant Neanderthal and Upper Paleolithic sites in southern France, spanning from Bordeaux to Montpellier.

Topics:

Feel free to adjust any specific phrases or details further if needed!

Source: www.newscientist.com

Ancient hominins discovered in Spain with facial bones dating back 1.1 million years

Who were the first inhabitants of Western Europe, what their physical characteristics were, and where they lived are some of the pending questions in the study of Eurasian settlements during the early Pleistocene epoch. Information on ancient humanity available from Western Europe is limited and limited to the Iberian Peninsula. Now, paleontologists have discovered a fragment of the midface of humanity at the site of the Sima del Elephante in Sierra de Atapuerc, Spain. Fossils, which were 1.4 million to 1.1 million years ago, represent the earliest human faces of Western Europe ever identified.

Archaeological excavations at the Sima del Elephante in Sierra de Atapuerc, Spain. Image credits: Maria D. Guillen/Iphes-Cerca.

“It is suggested that Eurasia was first settled by Hymonin at least 1.8 million years ago,” he said, institut Catetut Catetut Catetut Catetut de Paleoecologia Humana IEvolucióSocial, Rovira I Virgili, and Museo nacional de Ciencias natures, and colleagues

“Evidence of early human settlements in Western Europe is limited to highly fragmented fossil samples from the Iberian Peninsula, with few clues as to the appearance and classification of these human beings.”

“The fossils from the Spanish site, about 850,000 years ago, are Homo Alivisora species of early people with thin midfaces that resemble modern humans. ”

“In 2007, a Hominin Joborne (ATE9-1) was found at the Simadel Elephante site in northern Spain, between 12 and 1.1 million years ago, but it was not a definitive allocation. Homo Alivisor. ”

In the new study, the authors examined the fossil ruins of Hominin Midface from the Sima Del Elefante site.

The fragment labeled ATE7-1 consists of a substantial portion of the maxilla and zygote bone from the left side of an adult.

Using both physical evidence and 3D imaging techniques, the researchers reconstructed the fossil fragments, estimated to be between 1.4 million and 1.1 million.

They also discovered additional archaeological sites: stone tools and ruins of slaughtered animals.

“These practices demonstrate that the first Europeans had a close understanding of available animal resources and knew how to systematically utilize them,” Dr. Huguett said.

According to scientists, the ATE7-1 fossil does not display the “modern” midface features found in Homo Alivisor Fossils, but there are some similarities Homo Erectus system.

They tentatively allocated fossils Homo aff. Erectusshows affinity for Homo Erectuswithholding further evidence.

This finding may suggest that at least two people live in Western Europe Homo Early Pleistocene species: Homo aff. Erectusand later Homo Alivisor.

“The evidence is why it was assigned to the ''because it is still insufficient for a definitive classification. Homo aff. Erectus“Dr. Maria Martinon Torres, a researcher at the Centro Nacional de Investigation, said he is a researcher at Evolcion Humana in London and University College London.

“This designation recognizes the affinity of ATE7-1 Homo Erectus While it leaves the possibility that it belongs to another species open. ”

“Our findings demonstrate at least two different human invasions of Western Europe during the Pleistocene era, providing fascinating insights into the evolution of the genus. Homo. ”

“While their size is small, pioneering analysis of facial fragments greatly enriched our understanding of the origins and dynamics of the earliest Europeans on the continent.”

“More research and fossil samples are needed to investigate the relationships between these populations and further improve their classification,” the researchers concluded.

Their paper It was published in the journal this month Nature.

____

R. Huguett et al. The oldest human face in Western Europe. NaturePublished online on March 12, 2025. doi:10.1038/s41586-025-08681-0

Source: www.sci.news