Pseudoctenis Explained

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.

Taxonomy

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.[1]

Notes and References

  1. 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 . en . 10.1111/nph.19010 . 0028-646X. free . 37302411 . 10953041 .