Evans et al. (2021) seem to have been well aware of the circular reasoning in their argument.
Trilobozoans are unique to the Ediacaran biota; they appeared suddenly 560 million-years-ago in the fossil record without any precursors.
Even Evans et al. (2021) themselves admitt that “phylogenetic affinities for most of the Ediacara Biota remain enigmatic.”
Wow, that’s cool, they not only found the elusive Ediacaran animals but even could unravel their genomes!?
Small animals amuse and amaze scientists who take a close look at them in action. Sometimes it requires a high-speed camera to analyze the trick.