Asteriacites lumbricalis, a trace fossil of an ophiuroid echinoderm; Carmel Formation, near Gunlock, Utah; scale bar is 10 mm.
Asteriacites is the name given to five-rayed fossils found in rocks. They record the resting place of sea stars on the sea floor. Asteriacites is found in European and American rocks, from the Ordovician period onwards, and are numerous in rocks from the Jurassic system of Germany and North America.
