Description:Dimorphichnus is a horizontal trackway with two sets of impressions: thin and long scratch marks that are straight to slightly curved, and short prod marks. Both sets of marks are oblique to the overall direction of movement indicated by the trackway. Dimorphichnus is interpreted as a lateral grazing trace made by a trilobite, where the prod marks are toe impressions and the scratch marks are from raking movement.
Comments: This image is of a replica of a specimen from Dolf Seilacher's collection; the replica was part of a special display at the museum while I was visiting in July, 1995.
