Thaumaptilon is a fossil genus of animals from the middle Cambrian Burgess Shale which some authors have compared to members of the Ediacaran biota, generally believed to have disappeared at the start of the Cambrian, 539 million years ago.

[1] It was up to 20 cm long, and attached itself to the sea floor with a holdfast.

Thaumaptilon is considered important due to its resemblance to some frondose Ediacarans; it was believed to be a relative of forms such as Charnia.

[2][3][4] A 2020 study suggested that it should be placed in the group Petalonamae along with similar Ediacaran forms.

[6][7] The name Thaumaptilon is said to be derived from the Greek thauma, "wonderful", + ptilon, "soft feather".