Apodid sea cucumbers (Echinodermata: Holothuroidea) from the Upper Turonian of the Isle of Wolin, NW Poland

A diverse holothurian fauna from the Upper Turonian of the Isle of Wolin (northwestern Poland), is described and assessed with respect to palaeoecology, palaeobiology and evolutionary diversification. The fauna was recovered from chalk and partly silicified chalk. A stratigraphic re-assessment of all available biostratigraphic literature permits assignment to the Subprionocyclus neptuni ammonite zonal age (late Turonian). The majority of the holothurian fauna consists of apodid, aspidochirotid, and elasipodid species. The part of the fauna described here consists of sclerite species of three different Recent families of the Apodida. Two new forms, Calcancora venusta sp. nov. and Rigaudites ernsti sp. nov. (Synaptidae: Rynkatorpinae), are described, figured and discussed.