Mediterranean Quaternary interglacial molluscan assemblages: Palaeobiogeographical and palaeoceanographical responses to climate change

► Molluscs from Pleistocene Mediterranean as signals for climate reconstruction. ► Warm Pleistocene episodes with lower degree of seasonality than today. ► Winter palaeosea surface temperature on average 4 °C warmer than today. ► Palaeosea surface salinity close to that in tropical W Africa. ► Hydrological regime with more rainfall/runoff input than today.