Pseudoctenis
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 era. Pseudoctenis leaves were ≈ 1m long, they were leaves that are divided into a series of elongated leaflets and attached to a central axis are characteristic of many Mesozoic fossil floras. Pseudoctenis are similar to modern-day cycads and some, but not all are actually cycad remains.
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.