Abstract: The genus Siderolites of the family Calcarinidae is widely observed within the Maastrichtianaged shallow-marine sedimentary sequences of Anatolia. However, as is known, the only species foundin the Maastrichtian is Siderolites calcitrapoides Lamarck. The species Siderolites denticulatus Douvillewhich is known in the Maastrichtian age sediments of Europa is determined for the first time.