Pliodelphis (meaning "Pliocene dolphin") is a genus of small delphinid (oceanic dolphin) cetaceans that lived in Belgium during the Early Miocene epoch, about 5 million to 4.4 million years ago. The genus contains the type species Pliodelphis doelensis, named and described in 2021 based on a partial skull recovered from the littoral Kattendijk Formation.[1]