''Ptilophyllum'' is an extinct form genus of leaves belonging to the extinct seed plant order

Bennettitales Bennettitales (also known as cycadeoids) is an extinct order of seed plants that first appeared in the Permian period and became extinct in most areas toward the end of the Cretaceous. Bennettitales are among the most common Mesozoic seed plants ...

. The leaves, like other Bennettitales morphogenera are generally

pinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ...

. Leaves possibly attributable to the genus are known from the Oligocene of Australia, which may be the last known representatives of the order.

References

Prehistoric plant genera Bennettitales Triassic plants Jurassic plants Cretaceous plants Fossil taxa described in 1840 Prehistoric plants of North America {{cretaceous-plant-stub