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551 / Mesozoic
Pachypteris
Pachypteris gradinarui
Thick leathery pinnules and lower-surface stomata helped this seed fern withstand seasonal dryness.
- Time range
- About 205–190 million years ago
- Final stage
- Early Jurassic
- Geographic range
- Warm river-valley woodland · Romania
01 / DEFINITION & ECOLOGY
What was Pachypteris?
Pachypteris (Pachypteris gradinarui) was an extinct organism known from About 205–190 million years ago, with a range in Warm river-valley woodland · Romania.
Life and ecology
Pachypteris foliage grew on a shrub or small tree sharing river woodlands with conifers.
02 / DISAPPEARANCE
Why did Pachypteris disappear?
Jurassic vegetation turnover removed this leaf form.
03 / EVIDENCE
How do scientists know about Pachypteris?
Compressed leaves and fine cuticles preserve veins, epidermal cells and stomata; whole-plant affinity still relies on reproductive organs.
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?
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS