This trace fossil shows a cm-scale funnel-shaped to cylindrical burrow with U-shaped spreite, distinctive of a dwelling organism, infilled with fine, soft sediment (likely mud). The spreite is a curved structure formed by invertebrates tunneling in search of food. As burrows get filled with sediment, they can be preserved as trace fossils. These types of burrows are usually found in marine environments including intertidal, sub-tidal, and deep water. Diplocraterion trace fossils have been dated from the Cambrian period and continue to be formed today.