Macrodelphinus fossil map
Where fossils of Macrodelphinus have been found, shown on the Earth as it looked about 30 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 30 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 | 27.3–15.98 million years ago (Chattian to Burdigalian) |
| Periods | Paleogene, Neogene |
| Named by | Wilson 1935 |
| Fossil records | 6 occurrences at 2 locations (PBDB) |
| Found in | United States, France |
| Rock formations | Jewett, txn:NF |
About Macrodelphinus
Macrodelphinus is an extinct genus of primitive odontocete known from Early Miocene marine deposits in California.
Text in “About” is quoted from the Wikipedia article Macrodelphinus (revision 1358108158), 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: Q17013750.