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55 / Mesozoic
Yi qi
Yi qi
Membranous wings supported by long fingers and a rod-like styliform element projecting from the wrist differed from the feathered wings of birds.
Structured expansion · editorial review pending
- Time range
- About 164 million years ago
- Final stage
- Middle Jurassic
- Geographic range
- Northeastern China
01 / ANSWER FIRST
What was Yi qi?
This archive records Yi qi under the scientific name Yi qi, with an age of About 164 million years ago and a range of Northeastern China. Membranous wings supported by long fingers and a rod-like styliform element projecting from the wrist differed from the feathered wings of birds.
Yi qi belonged to a feathered dinosaur group that experimented with bat-like flight surfaces. It probably glided poorly but shows evolution testing many aerial designs.
02 / QUICK FACTS
Yi qi at a glance
- Scientific name
- Yi qi
- Age
- About 164 million years ago
- Last recorded stage
- Middle Jurassic
- Known range
- Northeastern China
- Broad group
- dinosaur
- Archive era
- Mesozoic
- Habitat signals
- vegetation, prey communities, floodplains and regional climate
- Documented regions
- Asia
03 / ANATOMY
How was Yi qi built?
Overall body plan
Membranous wings supported by long fingers and a rod-like styliform element projecting from the wrist differed from the feathered wings of birds.
Skull, teeth and display structures
The available record is interpreted through preserved proportions, attachment surfaces, wear and comparison with related organisms. For Yi qi, those observations must be separated from features added only for visual reconstruction.
Limbs, balance and locomotion
Yi qi belonged to a feathered dinosaur group that experimented with bat-like flight surfaces. It probably glided poorly but shows evolution testing many aerial designs.
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 Yi qi.
04 / DIET & BEHAVIOUR
How did Yi qi live?
Yi qi belonged to a feathered dinosaur group that experimented with bat-like flight surfaces. It probably glided poorly but shows evolution testing many aerial designs. 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 Yi qi live?
This archive currently lists About 164 million years ago; Northeastern China. 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
Northeastern China. This boundary can change when specimens are reidentified or new localities are published.
Time window
About 164 million years ago, with the final recorded stage listed as Middle Jurassic. 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 Yi qi?
Primary record
The holotype preserves feathers, traces of membrane and a rod-like styliform element associated with the wrist; its homology with ordinary wrist bones is uncertain.
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 Yi qi within About 164 million years ago and Northeastern China. 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.
Evidence limits for this record
The description identifies a styliform element and membrane traces. Its relationship to ordinary wrist bones and the complete wing outline remain reconstruction questions.
08 / DISAPPEARANCE & DEBATE
Why did Yi qi disappear?
Aerodynamic models test gliding performance but do not establish that poor flight or competition caused the extinction of this species; a direct cause remains unsupported.
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
Yi qi FAQ
What was Yi qi?
This archive records Yi qi under the scientific name Yi qi, with an age of About 164 million years ago. Membranous wings supported by long fingers and a rod-like styliform element projecting from the wrist differed from the feathered wings of birds.
When did Yi qi live?
The current archive range is About 164 million years ago; its youngest recorded stage is Middle Jurassic.
Where was Yi qi found?
The archive currently lists Northeastern China. Species-level locality assignments and the full geographic range still require source-specific review.
How do scientists know about Yi qi?
The holotype preserves feathers, traces of membrane and a rod-like styliform element associated with the wrist; its homology with ordinary wrist bones is uncertain.
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