Trace fossil · Resting

Rusophycus

A bilobate resting trace that records the outline of its maker, sometimes with a medial ridge. Its scratch sculpture may reveal roughly how many legs the maker had.

Behavior

Resting

Likely maker

Typically trilobites, though other arthropods can make it. Rusophycus records a resting animal; Cruziana records it moving.

Age range

Known from the earliest Cambrian, and again in the Triassic after trilobites had died out.

Setting

Marine settings; closely allied with Cruziana.

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