Late Cambrian
Weeks Shale Formation
House Range, UT, USA
133mm of uncurled worm on 100mm slab.

Worm. Soft-bodied. Lagerstatten.

Here’s an unidentified worm from a locality known for funky trilobites and funkier soft-bodied animals all from a time sandwiched between extinction events within the Cambrian and at its end. Without the high-resolution preservation, we wouldn’t be able see ghosts such as this from late in the period.

Big bad worm.