Hyolithes cecrops
Middle Cambrian
Spence Shale
NE of Brigham city
Utah, USA.

The Spence Shale is famous for its exceptional preservation of Cambrian marine life, including trilobites, brachiopods, and soft-bodied organisms. Specimens of Hyolithes provide important insight into the diversity of early shelled animals that lived alongside the first complex marine ecosystems.
Very fine 19MM inch on 54mm shale.