Trace fossil · Dwelling / feeding

Arenicolites

A vertical U-shaped burrow without spreite, sometimes with funnel-shaped tops.

Behavior: Dwelling / feeding
Likely maker: Worms, crustaceans or beetle larvae.
Setting: The textbook shows sand-filled Arenicolites as part of a Glossifungites (firmground) surface in Permian black shales.

**Sand-filled traces in Permian black shale (Glossifungites surface).** Michael C. Rygel via Wikimedia Commons, CC BY-SA 4.0. Source

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All trace fossils Ichnofacies

Sources

Rygel & Quinton, Sedimentary Geology 9.6: Trace Fossils