Английская Википедия:Annularia
Шаблон:Short description Шаблон:Automatic taxobox
Annularia is a form taxon, applied to fossil foliage belonging to extinct plants of the genus Calamites in the order Equisetales.
Description
Annularia is a form taxon name given to leaves of Calamites. In that species, the leaves formed radiating leaf whorls at each stem node, in a similar way to the branches of Equisetum, an extant genus of horsetails. Annularia leaves are arranged in whorls of between 8-13 leaves. The leaf shape is quite variable, being oval in Annularia sphenophylloides and linear to lanceolate in Annularia radiata, but they are always flat and of varying lengths.[1]
Calamites were arborescent and grew to a height of Шаблон:Convert.[2]
Fossil records
Fossils of this genus have been discovered in the Permian strata of Russia and in the Carboniferous (around Шаблон:Period span/brief) strata of the United States, Canada, China and Europe.[1][3]
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Specimen of Annularia stellata from Italy on display at the Museo Civico di Storia Naturale di Milano
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The foliage of Calamites
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Calamites reconstruction
See also
References
External links
- Страницы с неработающими файловыми ссылками
- Английская Википедия
- Horsetails
- Carboniferous plants
- Prehistoric plant genera
- Carboniferous first appearances
- Carboniferous extinctions
- Fossil taxa described in 1821
- Fossils of Georgia (U.S. state)
- Paleozoic life of New Brunswick
- Paleozoic life of Nova Scotia
- Prehistoric plants of North America
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