Genus
Polarichnus Narbonne, Gibling et Jones, 1979
Taxon description
Narbonne et al., 1979
Diagnosis. U-sharped burrow formed perpendicular to stratification, with burrow cross-section sub-rectangular to elliptical. spreite absent; sedimentary laminae between the arms are domed upward and show a distinctive pattern of small-scale asymmetric folds and microthrusts.
Classification