Rotadiscus is a genus of discoidal animal known from the Cambrian Chengjiang biota[3] and classified with the eldonioids.

The first is known only from one complete juvenile specimen and a few fragments, and was originally described as "Brzechowia sp."

[5] The species initially described as R. guizhouensis has since been reassigned to the genus Pararotadiscus.

[2] A 2023 cladistic analysis based on new fossils places Rotadiscus, along with other eldonioids, as stem-group ambulacrarians in the clade Cambroernida.

This article related to a Cambrian animal is a stub.