"Early evolution of the ecdysozoan body plan", Wang et al. 2024
https://elifesciences.org/reviewed-preprints/94709

A study that analyses fossils of early molting animals, and concludes that:

"ancestral ecdysozoans may have been non-vermiform animals."

#ecdysozoans are a group of animals that molt, and include nematodes and arthropods.

By the spikes you can tell this species was subject to heavy predation.