Rusophycus radwanskii Alpert, 1976

Description. Specimens are preserved on the soles of sandstone beds and are bilobed trace fossils 12.7 to 14.5 cm wide and up to 20.5 cm long Scratches are highly irregular but a series of fine scratches in bundles of eight runs parallel to the side of the trace fossil.
Other coarser scratches run across the major depression. The anterior part of the trace approximately circular is 4.2 cm deep and the posterior part which is weakly bilobed is 14 cm deep in the best preserved specimen.