Sphenopteris Explained

Sphenopteris is a genus of seed ferns containing the foliage of various extinct plants, ranging from the Devonian to Late Cretaceous.^{[1] [2]} One species, S. höninghausi, was transferred to the genus Crossotheca in 1911.^[3]

Biology

The frond of Sphenopteris could be up to 20inches long.

Distribution

In Brazil, fossil of form genus Sphenopteris was located in outcrop Morro Papalé in the city of Mariana Pimentel. They are in the geopark Paleorrota in Rio Bonito Formation and date from Sakmarian in Permian.^[4] Fossils of Sphenopteris have also been found in the Valle Alto Formation, Caldas, Colombia, among many other locations.^[5]

External links

• Jardin Botanico de Córdoba: Species tables

Notes and References

1. Book: Prehistoric Life: The Definitive Visual History of Life on Earth . . Palmer, Douglas. 2009 . New York . 149 . 978-0-7566-5573-0 . 1st American. etal.
2. http://www.georgesbasement.com/Langford-WilmingtonCoalFlora/Webpage/Sphenopteris-severalspeciesPP71-73.htm Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
3. F. L. S., Johnson, T. D. (1911). A seed-bearing Irish Pteridosperm, Crossotheca Höninghausi, Kidston (Lyginodendron oldhamium, Williamson). Royal Dublin Society
4. http://sigep.cprm.gov.br/sitio101/sitio101_impresso.pdf Afloramento Morro do Papaléo, Mariana Pimentel, RS
5. http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=157221 Sphenopteris