Sphenopteris is a genus of seed ferns containing the foliage of various extinct plants, ranging from the Devonian to Late Cretaceous.Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois One species, S. höninghausi, was transferred to the genus Crossotheca in 1911.F. L. S., Johnson, T. D. (1911). A seed-bearing Irish Pteridosperm, Crossotheca Höninghausi, Kidston (Lyginodendron oldhamium, Williamson). Royal Dublin Society
Biology The frond of Sphenopteris could be up to 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.Afloramento Morro do Papaléo, Mariana Pimentel, RS Fossils of Sphenopteris have also been found in the Valle Alto Formation, Caldas, Colombia, among many other locations.Sphenopteris at Fossilworks.org
Three species, S. gruenbachiana, S. ungeri and S. heterophylla are known from the Campanian aged Grünbach Formation of Austria.
References
External links Jardin Botanico de Córdoba: Species tables