Pteridospermatophyta
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| Pteridospermatophyta Fossil range: Devonian -Cretaceous | ||||||||
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"Pteridospermatophyta", also called seed ferns, is an extinct spermatophyte group of the Plantae kingdom. Members of this division were predominant at the late Devonian, declined some 250 mya, and disappeared in the Cretaceous. The Pteridospermatophyta have not yet acquired a clear position in botanical systematics and indeed appear to be a paraphyletic form taxon. Some appear to be allied or ancestral to the gymnosperms, others seem to be closer to angiosperms.
Orders often united in the seed ferns are:
- Arberiales
- Calamopityales
- Callistophytales
- Gigantopteridales (= "Gigantonomiales")
- Glossopteridales
- Leptostrobales
- Peltaspermales
[edit] External links
| Image:Ammonite-icon.png | This paleontology article is a stub. You can help Wikipedia by expanding it. |
fr:Pteridospermatophyta pl:Paprocie nasienne pt:Pteridospermatophyta
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