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108 / Mesozoic
Deinocheirus
Deinocheirus mirificus
Huge arms, a broad bill, a tall back and wide feet formed one of the strangest dinosaur silhouettes.
Structured expansion · editorial review pending
- Time range
- About 71–69 million years ago
- Final stage
- Late Cretaceous
- Geographic range
- Mongolian Plateau
01 / ANSWER FIRST
What was Deinocheirus?
This archive records Deinocheirus under the scientific name Deinocheirus mirificus, with an age of About 71–69 million years ago and a range of Mongolian Plateau. Huge arms, a broad bill, a tall back and wide feet formed one of the strangest dinosaur silhouettes.
Known first from two enormous arms, Deinocheirus proved to be a giant ornithomimosaur. Gastroliths and fish scales in its belly show an omnivore feeding on plants and aquatic prey.
02 / QUICK FACTS
Deinocheirus at a glance
- Scientific name
- Deinocheirus mirificus
- Age
- About 71–69 million years ago
- Last recorded stage
- Late Cretaceous
- Known range
- Mongolian Plateau
- Broad group
- dinosaur
- Archive era
- Mesozoic
- Habitat signals
- vegetation, prey communities, floodplains and regional climate
- Documented regions
- Asia
03 / ANATOMY
How was Deinocheirus built?
Overall body plan
Huge arms, a broad bill, a tall back and wide feet formed one of the strangest dinosaur silhouettes.
Skull, teeth and display structures
The available record is interpreted through preserved proportions, attachment surfaces, wear and comparison with related organisms. For Deinocheirus, those observations must be separated from features added only for visual reconstruction.
Limbs, balance and locomotion
Known first from two enormous arms, Deinocheirus proved to be a giant ornithomimosaur. Gastroliths and fish scales in its belly show an omnivore feeding on plants and aquatic prey.
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 Deinocheirus.
04 / DIET & BEHAVIOUR
How did Deinocheirus live?
Known first from two enormous arms, Deinocheirus proved to be a giant ornithomimosaur. Gastroliths and fish scales in its belly show an omnivore feeding on plants and aquatic prey. 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 vegetation, prey communities, floodplains and regional climate. 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 Deinocheirus live?
This archive currently lists About 71–69 million years ago; Mongolian Plateau. 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
Mongolian Plateau. This boundary can change when specimens are reidentified or new localities are published.
Time window
About 71–69 million years ago, with the final recorded stage listed as Late Cretaceous. 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 vegetation, prey communities, floodplains and regional climate. These labels help explore related records; a habitat reconstruction requires evidence from individual localities.
07 / FOSSIL EVIDENCE
What evidence supports reconstructions of Deinocheirus?
Primary record
More complete skeletons united the famous arms with its skull, back, feet and stomach contents.
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 Deinocheirus within About 71–69 million years ago and Mongolian Plateau. 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 Deinocheirus disappear?
It vanished from known rocks before the final impact, probably during regional ecological turnover.
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
Deinocheirus FAQ
What was Deinocheirus?
This archive records Deinocheirus under the scientific name Deinocheirus mirificus, with an age of About 71–69 million years ago. Huge arms, a broad bill, a tall back and wide feet formed one of the strangest dinosaur silhouettes.
When did Deinocheirus live?
The current archive range is About 71–69 million years ago; its youngest recorded stage is Late Cretaceous.
Where was Deinocheirus found?
The archive currently lists Mongolian Plateau. Species-level locality assignments and the full geographic range still require source-specific review.
How do scientists know about Deinocheirus?
More complete skeletons united the famous arms with its skull, back, feet and stomach contents.
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