A new trace fossil from the Ringerike Group, Southern Norway

Abundant small tracks from ripple-marked bedding planes on coarse-grained siltstones of the Ringerike Group near Sundvollen are described and illustrated. They occur about 450 m above the base of the Ringerike Group, much higher in the succession than previously described tracks from this Group. They differ from tracks of the eurypterid Hughmilleria in having parallel epichnial ridges and grooves rather than paired depressions, and are here named Steinsfjordichnus brutoni. Their age is probably lower Devonian.