| 词条 | Peltaspermaceae |
| 释义 |
| fossil_range = {{fossilrange|Middle Permian|Late Triassic|latest=200}} | image = Lepidopteris madagascariensis.tif | image_caption = Lepidopteris madagascariensis leaf from Early Triassic Newport Formation, near Sydney, Australia. | taxon = Peltaspermaceae | authority = Thomas 1933 | subdivision_ranks = Genera | subdivision =
}}Peltaspermaceae is a natural family of seed ferns (Pteridospermatophyta) widespread in both northern and southern hemispheres coal measures of Permian and Triassic age.[1] DescriptionPeltaspermaceae 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. References1. ^{{cite journal | title=On some pteridospermous plants from the Mesozoic rocks of South Africa | author=Thomas, H.H.| journal=Philosophical Transactions of the Royal Society B | year=1933 | volume=222 | issue=483–493| pages=193–265| doi=10.1098/rstb.1932.0016}} External links
6 : Permian plants|Triassic plants|Prehistoric plant families|Pteridospermatophyta|Permian first appearances|Triassic extinctions |
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