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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 (3ft 3in) long, they were leaves that are divided into a series of elongated leaflets (pinnate) and attached to a central axis (rachis) are characteristic of many Mesozoic fossil floras. Pseudoctenis are similar to modern-day cycads and some, but not all (Zamites) are actually cycad remains.
Text excerpted from the Wikipedia article Pseudoctenis by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
