Editing Common dolphin (section)

===Fossil record===
Many extinct cetacean species were once lumped into ''Delphinus'', but have since been placed in other genera. In the late 19th century several fossil species were described, including taxa: ''Delphinus baltringii'', ''Delphinus delannoy'' and ''Delphinus domeykoi''. However, these species are no longer considered valid.<ref>{{cite journal |last1=Gutstein |first1=Carolina |title=Cetáceos fósiles de Chile: Contexto evolutivo y paleobiogeográfico |journal=Publicación Ocasional del Museo Nacional de Historia Natural, Chile |date=2015 |volume=63 |pages=339–383}}</ref> Another species known as ''Delphinus brevidens'' was reassigned to the genus ''Stereodelphis'' which is now generally considered synonymous with ''[[Squalodon]]''.<ref>{{cite book |title=Proceedings of the United States National Museum: Volume 62 |date=1923 |publisher=Smithsonian Institution Press |page=10}}</ref>