Late Holocene subsistence and social integration in Sierras of Córdoba (Argentina): the South-American ostrich eggshells evidence

Zooarchaeological research carried out on South-American ostrich eggshells from late pre-Hispanic site Arroyo Talainín 2 (ca. 1100–300 BP, Sierras of Córdoba, Argentina) is presented in this paper. The resource importance has been assessed focusing mainly on its economic and political dimensions for social-unit integration rather than its classical use as a seasonal indicator. Eggshells taxonomic identification was performed by quantifying shell-pore density, and determining two Rheidae species: greater rhea (Rhea americana) and lesser rhea (Rhea pennata). High frequencies of burned eggshell fragments indicate an unequivocal association between this resource and the human occupations recorded at this site. Regional-scale data suggests that egg consumption took place disassociated from the main-residential camps. These locations were rock-shelters occupied by small-dispersed household groups or large-group food processing and consumption sites such as Arroyo Talainín 2. Thus, a flexible approach for a food-consumption study is required to account for its spatial dimension. Only a regional-scale archaeological research will allow advances to be made in our understanding of the subsistence patterns and socio-political organization of late pre-Hispanic human societies.