Peltaspermaceae
Peltaspermaceae is a natural family of seed ferns (Pteridospermatophyta) widespread in both northern and southern hemispheres coal measures of Permian and Triassic age.[1]
Peltaspermaceae | |
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Lepidopteris madagascariensis leaf from Early Triassic Newport Formation, near Sydney, Australia. | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Division: | †Pteridospermatophyta |
Order: | †Peltaspermales |
Family: | †Peltaspermaceae Thomas 1933 |
Genera | |
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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.
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References
- Thomas, H.H. (1933). "On some pteridospermous plants from the Mesozoic rocks of South Africa". Philosophical Transactions of the Royal Society B. 222 (483–493): 193–265. doi:10.1098/rstb.1932.0016.
External links
- "Fossilworks: Lepidopteris". paleodb.org. Retrieved 2016-03-18.
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