Stamnostoma
| Stamnostoma Temporal range:
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| A reconstruction of Stamnostoma huttonense from the Early Carboniferous Cementstone Group at Foulden Newton, Berwickshire, Scotland[1] | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | †Pteridospermatophyta |
| Class: | †Lyginopteridopsida |
| Order: | †Lyginopteridales |
| Family: | †Moresnetiaceae |
| Genus: | †Stamnostoma Long 1960 |
| Species | |
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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.
Description[edit]
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.
Whole plant reconstructions[edit]
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.
- Stamnostoma huttonense may have been produced by the same plant as Telangium (prepollen organ), Colatisporites decorus (prepollen), Lyginorachis papilio (permineralized petioles), Aneimites acadica (leaves), and Pitus primaeva (permineralized wood).
References[edit]
- ^ Retallack, G.J. & Dilcher, D.L (1988). "Reconstructions of selected seed ferns". Annals of the Missouri Botanical Garden. 75 (3): 1010–1057. doi:10.2307/2399379. JSTOR 2399379.
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