See text Taeniopteris is an extinct form genus of Mesozoic vascular plant leaves, perhaps representing those of cycads, bennettitaleans, or marattialean ferns.

The form genus is almost certainly a polyphyletic category for unfertile leaves of a certain shape ("taeniopterids") which cannot be assigned to specific groups due to a lack of information on cuticle or spore structures.

The leaves are simple, with a strong central vein (rhachis) and an unbroken margin.

Some fertile "taeniopterids" preserve spore packages, and can be assigned to marattialean ferns.

[1] Taeniopteris was named by Brongniart (1828) from an illustration of a Middle Jurassic leaf from Oxfordshire, as published by Sternberg (1823).