View original imageThis is an original generative reconstruction, not a photograph or scientific plate.
145 / Paleozoic
Psilophyton
Psilophyton dawsonii
Naked axes forked repeatedly, their fertile tips curling inward and carrying paired elongated sporangia.
Structured expansion · editorial review pending
- Time range
- About 400–390 million years ago
- Final stage
- End of the Early Devonian
- Geographic range
- Euramerican river plains · Gaspé Peninsula, Canada
01 / ANSWER FIRST
What was Psilophyton?
This archive records Psilophyton under the scientific name Psilophyton dawsonii, with an age of About 400–390 million years ago and a range of Euramerican river plains · Gaspé Peninsula, Canada. Naked axes forked repeatedly, their fertile tips curling inward and carrying paired elongated sporangia.
Psilophyton lacked true leaves but had more complex branching and xylem than the earliest land plants. Upright spiny shoots grew tens of centimeters tall and ended in clusters of sporangia.
02 / QUICK FACTS
Psilophyton at a glance
- Scientific name
- Psilophyton dawsonii
- Age
- About 400–390 million years ago
- Last recorded stage
- End of the Early Devonian
- Known range
- Euramerican river plains · Gaspé Peninsula, Canada
- Broad group
- plant
- Archive era
- Paleozoic
- Habitat signals
- plant communities, soils, water availability and climate
- Documented regions
- North America
03 / ANATOMY
How was Psilophyton built?
Overall body plan
Naked axes forked repeatedly, their fertile tips curling inward and carrying paired elongated sporangia.
Growth architecture
The available record is interpreted through preserved proportions, attachment surfaces, wear and comparison with related organisms. For Psilophyton, those observations must be separated from features added only for visual reconstruction.
Reproductive structures
Psilophyton lacked true leaves but had more complex branching and xylem than the earliest land plants. Upright spiny shoots grew tens of centimeters tall and ended in clusters of sporangia.
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 Psilophyton.
04 / DIET & BEHAVIOUR
How did Psilophyton live?
Psilophyton lacked true leaves but had more complex branching and xylem than the earliest land plants. Upright spiny shoots grew tens of centimeters tall and ended in clusters of sporangia. 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 plant communities, soils, water availability and 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 Psilophyton live?
This archive currently lists About 400–390 million years ago; Euramerican river plains · Gaspé Peninsula, Canada. 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
Euramerican river plains · Gaspé Peninsula, Canada. This boundary can change when specimens are reidentified or new localities are published.
Time window
About 400–390 million years ago, with the final recorded stage listed as End of the Early Devonian. 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 plant communities, soils, water availability and climate. These labels help explore related records; a habitat reconstruction requires evidence from individual localities.
07 / FOSSIL EVIDENCE
What evidence supports reconstructions of Psilophyton?
Primary record
Gaspé compressions and mineralized axes reveal branching, surface spines, sporangia and a central conducting strand.
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 Psilophyton within About 400–390 million years ago and Euramerican river plains · Gaspé Peninsula, Canada. 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 Psilophyton disappear?
As roots, leaves and layered crowns evolved through the Devonian, simple naked-axis plants were replaced.
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
Psilophyton FAQ
What was Psilophyton?
This archive records Psilophyton under the scientific name Psilophyton dawsonii, with an age of About 400–390 million years ago. Naked axes forked repeatedly, their fertile tips curling inward and carrying paired elongated sporangia.
When did Psilophyton live?
The current archive range is About 400–390 million years ago; its youngest recorded stage is End of the Early Devonian.
Where was Psilophyton found?
The archive currently lists Euramerican river plains · Gaspé Peninsula, Canada. Species-level locality assignments and the full geographic range still require source-specific review.
How do scientists know about Psilophyton?
Gaspé compressions and mineralized axes reveal branching, surface spines, sporangia and a central conducting strand.
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