Pterophyllum is an extinct form genus of leaves known from the Carnian[2] to the Maastrichtian,[3] belonging to the Bennettitales (family Williamsoniaceae).

The leaflets are regularly spaced, arranged opposite to each other, and have nearly parallel edges, only slightly broader at their bases and narrower at their tips.

[5] In the Mesozoic Era, the Pterophyllum thrived and could be found in great abundance together with the rest of the Bennettitales order.

This means that the morphology of their leaves are the only method to differentiate between the two: the fossil is classified as a Pterophyllum if the leaf has a length which is at least twice its width, and as an Anomozamite if it does not.

[4] The similar form genus Ctenophyllum from the Late Triassic of Germany (as well as misattributed North American leaves) is likely a junior synonym of Pterophyllum.