Rusophycus
| Rusophycus Temporal range:
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|---|---|
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| Rusophycus trace fossil from the Ordovician of southern Ohio. Scale bar is 10 mm. | |
Trace fossil classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Ichnogenus: | †Rusophycus J. Hall, 1852 |
Rusophycus is an
lifeforms' movement, rather than of the lifeforms themselves) allied to Cruziana.[1] Rusophycus is the resting trace, recording the outline of the tracemaker; Cruziana is made when the organism moved.[2]
The sculpture of Rusophycus may reveal the approximate number of legs that the tracemaker had, although striations (scratchmarks) from a single leg may overlap or be repeated.
Both Rusophycus and Cruziana are typically associated with
Permian extinction of trilobites), indicating that other producers could make the trace.[4]
References
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