 Shells of "Theodoxus fluviatilis" have been found in an Upper Paleolithic archaeological site in the cave Caldeirão, Pedreira (Tomar), Tomar Municipality, Portugal, and also in a site from about 6000 years B.P.of Litorina age on the Åland Islands.Shells from the Late Neolithic have been found in Divoká Šárka, Czech Republic.