None of the Cambrian animal phyla is represented in the Ediacaran fossil record.
I urge you to review this important series. Humbly place it at the feet of your favorite Darwinist, atheist, or theistic evolutionist.
The fossil record speaks clearly and cries out loud: the history of life on Earth is a history of saltations.
It is remarkable, indeed, how detailed a medusoid morphology was projected onto Kimberella fossils and later recognized as pure fantasy.
If identified as an animal, it would “predate the Cambrian explosion of bilaterian animal phyla as a kind of ‘advance guard.’”