Pseudoctenis is a genus of fossil foliage attributable to the Cycadales. It is one of the most common genera of cycad fossil foliage in the Mesozoic.

Pseudoctenis
Temporal range: PermianCretaceous
Scientific classification
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Pseudoctenis

Seward 1911[1]
Species

Taxonomy

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The genus was erected by Albert Seward based on material from the Jurassic of Sutherland. Although he did not publish a diagnosis for the genus, he noticed the similarity with the genus Ctenis, stating that the main difference between the two is the absence of anastomoses in Pseudoctenis.

A 2023 study found this genus to be polyphyletic, with various species closely related to Ctenis, Cycadaceae, and Zamiaceae.[2]

References

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  1. ^ Seward, A.C. (1911): The Jurassic flora of Sutherland. – Transactions of the Royal Society of Edinburgh 47: 643-709.
  2. ^ Coiro, Mario; Allio, Rémi; Mazet, Nathan; Seyfullah, Leyla J.; Condamine, Fabien L. (2023-06-11). "Reconciling fossils with phylogenies reveals the origin and macroevolutionary processes explaining the global cycad biodiversity". New Phytologist. 240 (4): 1616–1635. doi:10.1111/nph.19010. ISSN 0028-646X. PMC 10953041. PMID 37302411.