Macrokentriodon fossil map
Where fossils of Macrokentriodon 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 | 13.82–7.246 million years ago (Serravallian to Tortonian) |
| Periods | Neogene |
| Named by | Dawson 1996 |
| Fossil records | 6 occurrences at 3 locations (PBDB) |
| Found in | Portugal, United States |
| Rock formations | txn:NF, Choptank |
About Macrokentriodon
Macrokentriodon is an extinct genus of giant dolphin once assigned to the paraphyletic/polyphyletic family Kentriodontidae. Remains have been found in the late Miocene (Serravallian) Choptank Formation of United States.
Macrokentriodon is similar to Hadrodelphis in its larger size and its large tooth diameter. Despite being traditionally assigned to Kentriodontidae, recent cladistic analyses have recovered it along with Hadrodelphis in a clade with Kampholophos as sister to crown Delphinida and more derived than Kentriodon and Rudicetus.
Text in “About” is quoted from the Wikipedia article Macrokentriodon (revision 1236767882), 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: Q30672098.
