Have scientists discovered a new species of HUMAN? Ancient skull belonging to a child with no chin who lived 300,000 years ago suggests our family tree ‘needs another branch’

• A fossilised skill, jaw and leg bones were found in Hualongdong, China in 2019
• Interestingly, researchers say the unknown species ‘did not possess a true chin’ 

Scientists believe they may have identified a new species of human after finding an ancient skull that belonged to a child who lived up to 300,000 years ago.

The fossilised remains, which included a jaw, skull, and leg bones, were discovered in Hualongdong, China in 2019.

What bemused experts, however, is that the individual’s facial features did not match the lineage which split to form Neanderthals, nor Denisovans, nor us, leading them to suspect that we might be missing a branch from the human family tree.

Interestingly, researchers say the species ‘did not possess a true chin’.

This would make it more Denisovan-like – an extinct species of ancient human in Asia that split from Neanderthals more than 400,000 years ago. 

Discovery: Scientists believe they may have identified a new species of human after finding an ancient skull (pictured) that belonged to a child who lived up to 300,000 years ago

The limbs, skull cap and jaw – which likely belonged to a 12 or 13-year-old child – all seemed to ‘reflect more primitive traits’, according to experts at the Chinese Academy of Sciences (CAS).

But on the flip side, the rest of the child’s face had features more closely resembling modern humans.

It led the team of researchers to conclude that they had uncovered an entirely new lineage of hominins – a hybrid between the branch that gave us modern humans and the one led to Denisovans in the region.

This would mean there was the Homo erectus lineage which led to today’s Homo sapiens, the Denisovan lineage, and this third link in the hominin family tree in Asia which was ‘phylogenetically close’ to us.

Peculiar features: Interestingly, researchers say the species ‘did not possess a true chin’

It led the team of researchers to conclude that they had uncovered an entirely new lineage of hominins in Asia – a hybrid between the branch that gave us modern humans and the one led to Denisovans in the region

The finding is also significant because past studies on Neanderthal remains in Europe and western Asia have found evidence of a fourth lineage of hominin living in the Middle to Late Pleistocene.

However, this missing group has never been officially identified in the fossil record.

In China, Homo sapiens only appeared about 120,000 years ago.

But this new research would suggest that our ‘modern-day’ features were around for far longer than this in the East Asian region.

Researchers think it may be that the last common ancestor of Homo sapiens and Neanderthals arose in southwest Asia and later spread to all continents.

The new study was published in the Journal of Human Evolution.

TIMELINE OF HUMAN EVOLUTION

The timeline of human evolution can be traced back millions of years. Experts estimate that the family tree goes as such:

55 million years ago – First primitive primates evolve

15 million years ago – Hominidae (great apes) evolve from the ancestors of the gibbon

7 million years ago – First gorillas evolve. Later, chimp and human lineages diverge

5.5 million years ago – Ardipithecus, early ‘proto-human’ shares traits with chimps and gorillas

4 million years ago – Ape like early humans, the Australopithecines appeared. They had brains no larger than a chimpanzee’s but other more human like features 

3.9-2.9 million years ago – Australoipithecus afarensis lived in Africa.  

2.7 million years ago – Paranthropus, lived in woods and had massive jaws for chewing  

2.6 million years ago – Hand axes become the first major technological innovation 

2.3 million years ago – Homo habilis first thought to have appeared in Africa

1.85 million years ago – First ‘modern’ hand emerges 

1.8 million years ago – Homo ergaster begins to appear in fossil record 

800,000 years ago – Early humans control fire and create hearths. Brain size increases rapidly

400,000 years ago – Neanderthals first begin to appear and spread across Europe and Asia

300,000 to 200,000 years ago – Homo sapiens – modern humans – appear in Africa

54,000 to 40,000 years ago – Modern humans reach Europe 

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