Goniodelphis hudsoni is an extinct iniid river dolphin known from the waters of Florida during the Miocene ~14.9—11.5 through 9.1—8.7 Ma (AEO). The fossil specimens were found in just four phosphate mines in Polk County, Florida. These mines were: * American Agricultural Chemical Company (Serravallian) * Fort Green (Hemphillian) * Payne Creek (Hemphillian) * Gardinier (Zanclean)