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Peltaspermaceae

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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

  1. ^ 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.
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