Paleolithic inhabitants of the Iberian Mediterranean region may have eaten snails 10,000 years earlier than their Mediterranean neighbors, according to a study published August 20, 2014 in the open-access journal PLOS ONE by Javier Fernández-López de Pablo from Institut Català de Paleoecologia Humana i Evolució Social (IPHES) and colleagues.
Snails were widespread in the Late Pleistocene and Holocene, but it is still unknown when and how they were incorporated into human diets. The authors of this study found land snail shell remains from ~30,000 years ago at a recently discovered site of Cova de la Barriada (Benidorm, Spain). To better understand if the inhabitants may have eaten snails, the researchers investigated patterns of land snail selection, consumption, and accumulation at the site, and then analyzed the shells decay, fossilization process, composition, and age at death by measuring the shell size.
Stone tools and other animal
Scientists found groupings of complete shells from a large land snail species at three layers of the site, corresponding to different time points dated 31000-26900 years ago. The adult snails were close to prehistoric human-constructed structures that may have been used to cook the snails, along with stone tools, and other animal remains that were likely roasted in ambers of pine and juniper under 375 ºC. The authors posit that these results point to previously undiscovered patterns of invertebrate use and may highlight a broadening of the human diet in the Upper Paleolithic in the Mediterranean basin. In neighboring Mediterranean areas, eating land snails didn’t appear until about 10,000 years later, which may make these newly found snail shells the oldest known evidence that ancient human populations used them as a food resource in Europe ~30,000 years ago.
For further information
“Land snails as a diet diversification proxy during the Early Upper Palaeolithic in Europe”, Fernández-López de Pablo, J. et al. PLOS ONE (2014)