Explore this animal in Size of Extinct Animals ↗
468 / Cenozoic
Eobasileus
Eobasileus cornutus
Three pairs of skull bosses and long canines crowned a rhino-sized herbivore.
View original image · 1600 × 1067- Time range
- About 46–40 million years ago
- Final stage
- Late Eocene
- Geographic range
- Floodplain woodland · North America
01 / DEFINITION & ECOLOGY
What was Eobasileus?
Eobasileus (Eobasileus cornutus) was an extinct organism known from About 46–40 million years ago, with a range in Floodplain woodland · North America.
Life and ecology
It browsed humid woodland; males may have displayed or fought with the head structures.
02 / DISAPPEARANCE
Why did Eobasileus disappear?
Eocene climate change and herbivore turnover are possible context, but they do not establish a specific cause for Eobasileus.
03 / EVIDENCE
How do scientists know about Eobasileus?
Skulls, teeth and skeletons constrain boss bases and size; keratin covering is reconstructed.
04 / SOURCES & FURTHER READING
Check the source record
Use the scientific name to compare taxonomy, occurrence records and the fossil record. Database coverage and classifications may differ.
05 / REVISION HISTORY
How has this record changed?
- Rewrote an extinction cause that presented environmental or faunal turnover as established; it is now given as context the record does not prove.
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS