Goniodelphis fossil map
Where fossils of Goniodelphis have been found, shown on the Earth as it looked about 5 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 5 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Early mammals |
|---|---|
| Lived | 11.63–3.6 million years ago (Tortonian to Zanclean) |
| Periods | Neogene |
| Family | Iniidae |
| Named by | Allen 1941 |
| Fossil records | 10 occurrences at 3 locations (PBDB) |
| Found in | United States, Costa Rica |
| Rock formations | Peace River, Curré |
About Goniodelphis
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)
Text in “About” is quoted from the Wikipedia article Goniodelphis (revision 1255782079), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q5581922.
