Sphenopteris

Sphenopteris; Temporal range: Late Devonian-Cretaceous; ~388–70 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Sphenopteris specimen found in Carboniferous rocks in Loire-Atlantique department, France
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	†Pteridospermatophyta
Class:	†Lyginopteridopsida
Order:	†Lyginopteridales
Family:	†Lyginopteridaceae
Genus:	†Sphenopteris; Sternberg 1825
Species
	S. alata †; S. elegans †; S. fragilis †; S. obtusiloba †; S. pinnae †; S. plicata †; S. pottsvillea †; S. sanjuliensis †; S. spiniformis †; S. suessi †; S. trifoliata †; S. valentinii †;

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]

^ Palmer, Douglas; et al. (2009). Prehistoric Life: The Definitive Visual History of Life on Earth (1st American ed.). New York: Dorling Kindersley. p. 149. ISBN 978-0-7566-5573-0.
^ Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
^ F. L. S., Johnson, T. D. (1911). A seed-bearing Irish Pteridosperm, Crossotheca Höninghausi, Kidston (Lyginodendron oldhamium, Williamson). Royal Dublin Society

[dk-1] Palmer, Douglas; et al. (2009). Prehistoric Life: The Definitive Visual History of Life on Earth (1st American ed.). New York: Dorling Kindersley. p. 149. ISBN 978-0-7566-5573-0.

[2] 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

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Sphenopteris Temporal range: Late Devonian-Cretaceous ~388–70 Ma PreꞒ Ꞓ O S D C P T J K Pg N

Sphenopteris specimen found in Carboniferous rocks in Loire-Atlantique department, France
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	†Pteridospermatophyta
Class:	†Lyginopteridopsida
Order:	†Lyginopteridales
Family:	†Lyginopteridaceae
Genus:	†Sphenopteris Sternberg 1825
Species
S. alata † S. elegans † S. fragilis † S. obtusiloba † S. pinnae † S. plicata † S. pottsvillea † S. sanjuliensis † S. spiniformis † S. suessi † S. trifoliata † S. valentinii †