This study identified the Planorbidae shells from Corondó Archaelogical Site, RJ, as Biomphalaria aff. tenagophila. This Site was dated from 3000-4000 year BP (C-14). It is thought that the shells were transported by hunters-collectors who lived in the area. In constrast to B. tenagophila, now living in areas nearby, the ancient B. aff. tenagophila were wider.