Early Cambrian microfossils preserve introvert musculature of cycloneuralians
[phys.org]

The open access paper is:

Zhang, H., Xiao, S., Eriksson, M.E., Duan, B. and Maas, A., 2023. Musculature
of an Early Cambrian cycloneuralian animal. Proceedings of the Royal Society
B, 290(2008), p.20231803.
[royalsocietypublishing.org]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)