The six fragments recovered from Abauntz cave in the Ultzama valley include three metacarpal bones and a middle phalanx from the right hand of an adult individual, together with two other fragments identified as human through protein analysis. Genetic studies confirm the remains come from a male Neanderthal. Some bones show carnivore bite marks, offering clues about what happened to the body after death and how the bones entered the cave.
The fossils were found in an archaeological context with stone tools and animal remains, some bearing signs of having been processed and eaten by the human groups that occupied the cavity. This context helps to situate Neanderthal presence at Abauntz and to understand the activities carried out there.
Until now, no fossils directly confirmed that Neanderthals passed through this area. "For the first time we have human remains that allow us to directly identify the presence of Neanderthals in Navarre," said Andion Arteaga, co-director of the project, in a press release. The date is significant: 46,000 years ago Neanderthals were still living in parts of Europe, but they disappeared from the continent around 40,000 years ago, a period also marked by the expansion of Homo sapiens.
Abauntz cave lies in a natural corridor connecting the Iberian Peninsula with the rest of Europe, making it a good site to study mobility and possible contacts between human groups on both sides of the Pyrenees. The team combined palaeoproteomics, genetic analyses and radiocarbon dating to identify the bones, determine the individual's sex and establish their chronology, working with the University of Vienna and the Max Planck Institute for Evolutionary Anthropology in Leipzig. The clearest precedent is El Sidrón in Asturias, where genetics has shed light on kinship, social organisation and the evolutionary history of Neanderthals.
"Being able to recover ancient DNA and obtain direct dates for the fossils is particularly significant," stressed Mikel Arlegi, also co-director of the project. Genetic analyses are ongoing and could provide more information about the evolutionary history and demographic dynamics of these populations.
The research originated at the Institut Català de Paleoecologia Humana i Evolució Social (Iphes-Cerca) and involves more than 25 specialists from institutions including the National Centre for Research on Human Evolution and the Institute of Archaeology of Mérida. The project is supported by the Government of Navarre, the Council of the Ultzama Valley, the Arraitz-Orkin local council and the Palarq Foundation.
