Biology:Peltaspermaceae
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Short description: Extinct family of seed ferns
| Peltaspermaceae | |
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| File:Lepidopteris madagascariensis.tif | |
| Lepidopteris madagascariensis leaf from Early Triassic Newport Formation, near Sydney, Australia. | |
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| Reconstructed leaf (Lepidopteris callipteroides) and its reproductive organs (Peltaspermum townrovii and Permotheca helbyi) from the latest Permian Coal Cliff Sandstone of Oakdale Colliery, NSW | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Order: | †Peltaspermales |
| Family: | †Peltaspermaceae Thomas 1933 |
| Genera | |
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Peltaspermaceae is a family of peltasperms, an extinct order of seed plants, widespread in both northern and southern hemispheres coal measures of Permian and Triassic age.[1] Peltasperms persisted in a relictual distribution in Patagonia during the Early Jurassic.[2]
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.
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.
- ↑ Elgorriaga, Andrés; Escapa, Ignacio H.; Cúneo, N. Rubén (July 2019). "Relictual Lepidopteris (Peltaspermales) from the Early Jurassic Cañadón Asfalto Formation, Patagonia, Argentina" (in en). International Journal of Plant Sciences 180 (6): 578–596. doi:10.1086/703461. ISSN 1058-5893. https://www.journals.uchicago.edu/doi/10.1086/703461.
External links
- "Fossilworks: Lepidopteris". paleodb.org. http://paleodb.org/?a=basicTaxonInfo&taxon_no=157186. Retrieved 2016-03-18.
Wikidata ☰ Q24073556 entry
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