Stamnostoma
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Stamnostoma Temporal range: Early Carboniferous |
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| A reconstruction of Stamnostoma huttonense from the Early Carboniferous Cementstone Group at Foulden Newton, Berwickshire, England | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | †Pteridospermatophyta |
| Class: | †Lyginopteridopsida |
| Order: | †Lyginopteridales |
| Family: | †Moresnetiaceae |
| Genus: |
†Stamnostoma Long 1960 |
| Species | |
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Stamnostoma huttonense |
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Stamnostoma huttonense
Stamnostoma is an extinct genus of seed ferns based on cupules with seeds. These are among the earliest known seed plants and of earliest Carboniferous (Tournaisian) age.
The ovules of Stamnostoma have a complex apex with plug and cone mechanism for creating a chamber for prepollen, as in other Lyginopteridales. Several ovules are borne on an elongate open cupule of bracts.
Different organs attributed to the same original plant can be reconstructed from co-occurrence at the same localities in the Scottish Borders county of Berwickshire.
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