Peltaspermaceae
| Peltaspermaceae Temporal range: Middle Permian–Late Triassic | |
|---|---|
 | |
| Lepidopteris madagascariensis leaf from Early Triassic Newport Formation, near Sydney, Australia. | |
| Scientific classification | |
| Kingdom: | Plantae |
| Phylum: | †Pteridospermophyta |
| Order: | †Peltaspermales |
| Family: | Peltaspermaceae Thomas 1933 |
| Genera | |
| |
Peltaspermaceae is a natural family of seed ferns (Pteridospermophyta) widespread in both northern and southern hemispheres coal measures of Permian and Triassic age. [1]
Description
Peltaspermaceae have umbrella-like (peltate) cupules with numerous pendant ovules born in complex large branching structures (Peltaspermum). The pollen organ (Antevsia) has radiating cigar-shaped pollen sacs attached to small blades, again in complex branching structures. The leaves (Lepidopteris) are bipinnate to tripinnate with small pinnules on the rachis.
See also
References
- ↑ Thomas, H.H. (1933). "On some pteridospermous plants from the Mesozoic rocks of South Africa". Philosophical Transactions of the Royal Society Series B. 222: 193–265.
External links
- "Fossilworks: Lepidopteris". paleodb.org. Retrieved 2016-03-18.
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