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64 / Cenozoic
Uintatherium
Uintatherium anceps
Knob-like skull horns and long canines crowned this rhinoceros-sized herbivore.
Structured expansion · editorial review pending
- Time range
- About 46–38 million years ago
- Final stage
- Eocene
- Geographic range
- North America
01 / ANSWER FIRST
What was Uintatherium?
This archive records Uintatherium under the scientific name Uintatherium anceps, with an age of About 46–38 million years ago and a range of North America. Knob-like skull horns and long canines crowned this rhinoceros-sized herbivore.
Uintatherium browsed lush Eocene floodplains. Males had larger skull ornaments, suggesting display or competition, while its brain was remarkably small for its body.
02 / QUICK FACTS
Uintatherium at a glance
- Scientific name
- Uintatherium anceps
- Age
- About 46–38 million years ago
- Last recorded stage
- Eocene
- Known range
- North America
- Broad group
- mammal or synapsid
- Archive era
- Cenozoic
- Habitat signals
- food webs, vegetation, water, climate and competition
- Documented regions
- North America
03 / ANATOMY
How was Uintatherium built?
Overall body plan
Knob-like skull horns and long canines crowned this rhinoceros-sized herbivore.
Skull, teeth and feeding mechanics
The available record is interpreted through preserved proportions, attachment surfaces, wear and comparison with related organisms. For Uintatherium, those observations must be separated from features added only for visual reconstruction.
Limbs, posture and body mass
Uintatherium browsed lush Eocene floodplains. Males had larger skull ornaments, suggesting display or competition, while its brain was remarkably small for its body.
Growth and individual variation
A single specimen does not define the whole species. Size, maturity, preservation and possible sex differences are considered before anatomical traits are treated as typical of Uintatherium.
04 / DIET & BEHAVIOUR
How did Uintatherium live?
Uintatherium browsed lush Eocene floodplains. Males had larger skull ornaments, suggesting display or competition, while its brain was remarkably small for its body. This ecological reconstruction is strongest where anatomy, associated organisms and the depositional setting point in the same direction.
05 / DIET & BEHAVIOUR
What shaped its ecological limits?
Its populations depended on food webs, vegetation, water, climate and competition. Changes in any one factor did not necessarily cause immediate extinction, but interacting pressures could reduce range, recruitment and resilience.
06 / RANGE & HABITAT
Where and when did Uintatherium live?
This archive currently lists About 46–38 million years ago; North America. Fossil or historical occurrence data describe where evidence has been found, not every place the taxon once occupied. Species-level age and range limits still require source-specific review.
Documented geographic range
North America. This boundary can change when specimens are reidentified or new localities are published.
Time window
About 46–38 million years ago, with the final recorded stage listed as Eocene. Rock units and dating uncertainty mean the true biological range may extend beyond the known record.
Environmental setting
The archive uses the broad habitat labels food webs, vegetation, water, climate and competition. These labels help explore related records; a habitat reconstruction requires evidence from individual localities.
07 / FOSSIL EVIDENCE
What evidence supports reconstructions of Uintatherium?
Primary record
Complete skulls, skeletons and sex-linked variation reveal its appearance.
Comparative anatomy
Preserved structures are compared with close and functionally similar organisms. The method can constrain posture and function, but analogy alone cannot prove colour, behaviour or soft tissue.
Age and locality
Stratigraphy and occurrence records place Uintatherium within About 46–38 million years ago and North America. Reworked fossils and uncertain provenance are treated cautiously.
Open entity records
Links below connect the archive to available taxonomic and occurrence records. A matching name does not verify every ecological claim, and related-taxon links provide comparison rather than an exact species match.
08 / DISAPPEARANCE & DEBATE
Why did Uintatherium disappear?
Cooling climates and mammalian turnover ended the dinoceratan lineage.
The last fossil or observation marks the youngest evidence currently known, not necessarily the death of the final individual. Explanations are strongest when timing, environmental change and population biology agree; otherwise the profile preserves uncertainty instead of assigning a single dramatic cause.
09 / FREQUENTLY ASKED QUESTIONS
Uintatherium FAQ
What was Uintatherium?
This archive records Uintatherium under the scientific name Uintatherium anceps, with an age of About 46–38 million years ago. Knob-like skull horns and long canines crowned this rhinoceros-sized herbivore.
When did Uintatherium live?
The current archive range is About 46–38 million years ago; its youngest recorded stage is Eocene.
Where was Uintatherium found?
The archive currently lists North America. Species-level locality assignments and the full geographic range still require source-specific review.
How do scientists know about Uintatherium?
Complete skulls, skeletons and sex-linked variation reveal its appearance.
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?
- Completed an AI-assisted bilingual audit of the archive record, corrected identified issues and clarified evidence limits; independent editorial review is pending.
- Expanded into a structured bilingual profile with anatomy, ecology, range, evidence, debate and FAQs; independent editorial review is pending.
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS