Enhydriodon fossil map
Where fossils of Enhydriodon 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 | 23.04–0.774 million years ago (Aquitanian to Calabrian) |
| Periods | Neogene, Quaternary |
| Family | Mustelidae |
| Named by | Falconer 1868 |
| Fossil records | 60 occurrences at 23 locations (PBDB) |
| Found in | Kenya, Ethiopia, South Africa, Pakistan, Chad, Egypt, Uganda, China, India, Russia |
| Rock formations | Varswater, Hadar, txn:41086, Pinjor, Kanapoi, Chemeron |
About Enhydriodon
Enhydriodon is an extinct genus of otters known from Africa and South Asia that lived from the late Miocene to the early Pleistocene. It contains nine confirmed species, two debated species, and at least a few other undescribed species from Africa. The genus name means "otter tooth" in Ancient Greek and is a reference to its dentition rather than to the Enhydra genus, which includes the modern sea otter and its two prehistoric relatives. Enhydriodon belongs to the tribe Enhydriodontini (which also contains Sivaonyx and Vishnuonyx) in the otter subfamily Lutrinae.
The exact sizes and lengths of Enhydriodon species are unknown given the lack of complete fossils of it and most related fossil lutrines. Indian subcontinental species are estimated to be of weights similar to that of the extant sea otter, but African species are estimated to be heavier than extant lutrines. In particular, several species such as E. kamuhangirei, E. dikikae, and E. omoensis were estimated to weigh over 100 kg (220 lb). Given these weight estimates, the three species likely reached sizes comparable to extant bears or lions, making them the largest known mustelids to exist, although a lack of complete specimens makes precise estimates impossible.
Text in “About” is quoted from the Wikipedia article Enhydriodon (revision 1379554344), 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: Q27962593.
